<SEC-DOCUMENT>0001437749-16-037881.txt : 20160822
<SEC-HEADER>0001437749-16-037881.hdr.sgml : 20160822
<ACCEPTANCE-DATETIME>20160822093406
ACCESSION NUMBER:		0001437749-16-037881
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20160819
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Unregistered Sales of Equity Securities
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20160822
DATE AS OF CHANGE:		20160822

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GeoVax Labs, Inc.
		CENTRAL INDEX KEY:			0000832489
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		IRS NUMBER:				870455038
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-52091
		FILM NUMBER:		161844342

	BUSINESS ADDRESS:	
		STREET 1:		1900 LAKE PARK DRIVE
		STREET 2:		SUITE 380
		CITY:			SMYRNA
		STATE:			2Q
		ZIP:			30080
		BUSINESS PHONE:		678-384-7220

	MAIL ADDRESS:	
		STREET 1:		1900 LAKE PARK DRIVE
		STREET 2:		SUITE 380
		CITY:			SMYRNA
		STATE:			2Q
		ZIP:			30080

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Geovax Labs, Inc.
		DATE OF NAME CHANGE:	20061002

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DAUPHIN TECHNOLOGY INC
		DATE OF NAME CHANGE:	19940826

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUCCESSO INC
		DATE OF NAME CHANGE:	19910410
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>govx20160819_8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
<HTML><HEAD><TITLE>govx20160819_8k.htm</TITLE>
<!-- Created by RDG HTML Converter -->
</HEAD>
<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 10px; MARGIN-RIGHT: 10px">
<P id=PARA1 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman, Times, serif"><B>UNITED STATES</B></FONT></P>
<P id=PARA2 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman, Times, serif"><B>SECURITIES AND EXCHANGE COMMISSION</B></FONT></P>
<P id=PARA3 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>WASHINGTON, D.C. 20549</B></FONT></P>
<P id=PARA4 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<HR style="BORDER-TOP: medium none; HEIGHT: 1px; BORDER-RIGHT: medium none; WIDTH: 10%; BORDER-BOTTOM: medium none; COLOR: #000000;  BORDER-LEFT: medium none; BACKGROUND-COLOR: #000000" align="center">

<P id=PARA7 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman, Times, serif"><B>FORM 8-K</B></FONT></P>
<P id=PARA8 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA9 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>CURRENT REPORT</B></FONT></P>
<P id=PARA10 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Pursuant to Section 13 or 15(d) of the</B></FONT></P>
<P id=PARA11 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Securities Exchange Act of 1934</B></FONT></P>
<P id=PARA12 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA13 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Date of report (Date of earliest event reported):&nbsp;&nbsp;</B><B>August 19</B><B>, 2016</B></FONT></P>
<P id=PARA14 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<HR style="BORDER-TOP: medium none; HEIGHT: 1px; BORDER-RIGHT: medium none; WIDTH: 10%; BORDER-BOTTOM: medium none; COLOR: #000000;  BORDER-LEFT: medium none; BACKGROUND-COLOR: #000000" align="center">

<P id=PARA17 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman, Times, serif"><B>GEOVAX LABS, INC.</B></FONT></P>
<P id=PARA18 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(Exact name of registrant as specified in its charter)</B></FONT></P>
<P id=PARA19 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA20 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=TBL32  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA21 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Delaware</B></FONT></P></TD>
<TD style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<P id=PARA22 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P></TD>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA23 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>000-52091</B></FONT></P></TD>
<TD style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<P id=PARA24 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P></TD>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA25 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>87-0455038</B></FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA26 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(State or other jurisdiction of</B></FONT></P>
<P id=PARA27 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>incorporation or organization)</B></FONT></P></TD>
<TD style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<P id=PARA28 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P></TD>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA29 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(Commission File No.)</B></FONT></P></TD>
<TD style="WIDTH: 2%; VERTICAL-ALIGN: bottom">
<P id=PARA30 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P></TD>
<TD style="WIDTH: 32%; VERTICAL-ALIGN: top">
<P id=PARA31 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(IRS Employee Identification No.)</B></FONT></P></TD></TR></TABLE>
<P id=PARA33 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA34 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA35 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>1900 Lake Park Drive, Suite 380</B></FONT></P>
<P id=PARA36 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Smyrna, Georgia 30080</B></FONT></P>
<P id=PARA37 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(Address of principal executive offices) (Zip code)</B></FONT></P>
<P id=PARA38 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA39 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA40 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(678) 384-7220</B></FONT></P>
<P id=PARA41 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>(Registrant&#8217;s telephone number, including area code)</B></FONT></P>
<P id=PARA42 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA43 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA44 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions.</FONT></P>
<P id=PARA45 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA46 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">[&nbsp;&nbsp;] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></P>
<P id=PARA47 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA48 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">[&nbsp;&nbsp;] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)</FONT></P>
<P id=PARA49 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA50 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">[&nbsp;&nbsp;] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).</FONT></P>
<P id=PARA51 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA52 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">[&nbsp;&nbsp;] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13(e)-4(c))</FONT></P>
<P id=PARA53 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></P>
<P id=PARA55.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK55  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR55  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM55  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">1</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR55  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA55.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P>
<P id=PARA58 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">This Form 8-K and other reports filed by GeoVax Labs, Inc. (the &#8220;Registrant&#8221;) from time to time with the Securities and Exchange Commission (collectively the &#8220;Filings&#8221;) contain forward looking statements and information that are based upon beliefs of, and information currently available to, the Registrant&#39;s management as well as estimates and assumptions made by the Registrant&#8217;s management.&nbsp;&nbsp;When used in the Filings the words &#8220;anticipate&#8221;, &#8220;believe&#8221;, &#8220;estimate&#8221;, &#8220;expect&#8221;, &#8220;future&#8221;, &#8220;intend&#8221;, &#8220;plan&#8221; or the negative of these terms and similar expressions as they relate to the Registrant or the Registrant&#8217;s management identify forward looking statements.&nbsp;&nbsp;Such statements reflect the current view of the Registrant with respect to future events and are subject to risks, uncertainties, assumptions and other factors relating to the Registrant&#8217;s industry, operations and results of operations and any businesses that may be acquired by the Registrant.&nbsp;&nbsp;Should one or more of these risks or uncertainties materialize, or should the underlying assumptions prove incorrect, actual results may differ significantly from those anticipated, believed, estimated, expected, intended or planned.&nbsp;&nbsp;Except as required by law, the Registrant does not undertake to update its forward looking statements.</FONT></P>
<P id=PARA59 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA60 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Item 1.01 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Entry into a Material Definitive Agreement</B></FONT></P>
<P id=PARA61 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA62 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">On August 19, 2016, we entered into an agreement with Sabby Healthcare Master Fund, Ltd. and Sabby Volatility Warrant Master Fund, Ltd. (the &#8220;Purchasers&#8221;) with respect to:</FONT></P>
<P id=PARA63 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=MTAB65  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 18pt">&nbsp;</TD>
<TD style="WIDTH: 18pt; VERTICAL-ALIGN: top">
<P id=PARA66 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&#9679;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P></TD>
<TD style="VERTICAL-ALIGN: top">
<P id=PARA67 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The exercise by the Purchasers of their Series A Common Stock Purchase Warrants (&#8220;Series A Warrants&#8221;) to acquire an aggregate of 1,207,332 shares of our common stock for cash at $0.09416 per share in return for a warrant exercise fee of $0.02916 per share purchased;</FONT></P></TD></TR></TABLE>
<TABLE id=MTAB69  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 18pt">&nbsp;</TD>
<TD style="WIDTH: 18pt; VERTICAL-ALIGN: top">
<P id=PARA70 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&#9679;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P></TD>
<TD style="VERTICAL-ALIGN: top">
<P id=PARA71 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Exercise by the Purchasers of a sufficient number of outstanding Series E Common Stock Purchase Warrants (&#8220;Series E Warrants&#8221;) such that each of the Purchasers shall thereafter be the beneficial owner of 9.98% of our common stock (after taking into account the exercise of the Series A Warrants); and</FONT></P></TD></TR></TABLE>
<TABLE id=MTAB73  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 18pt">&nbsp;</TD>
<TD style="WIDTH: 18pt; VERTICAL-ALIGN: top">
<P id=PARA74 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&#9679;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P></TD>
<TD style="VERTICAL-ALIGN: top">
<P id=PARA75 style="MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left; MARGIN-TOP: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">An extension of the term of the Series E Warrants from August 27, 2016 to December 31, 2016.</FONT></P></TD></TR></TABLE>
<P id=PARA76 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA77 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">As of the date of the agreement, Sabby Healthcare Master Fund, Ltd. owned Series E Warrants to acquire 2,801,039 shares of our common stock, and Sabby Volatility Warrant Master Fund, Ltd. owned Series E Warrants to acquire 2,851,031 shares. The exercise price and related warrant exercise fees for the exercise of Series E Warrants by the Purchasers are the same as those for the Series A Warrants. The Purchasers also confirmed their agreement that if they desire to acquire additional shares of our common stock, then subject to specified conditions, they shall first exercise their rights to buy such shares through exercise of Series E Warrants, rather than other rights they have to acquire such shares.</FONT></P>
<P id=PARA78 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA79 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The foregoing description of the letter agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the agreement.&nbsp; A copy of the agreement is attached as an exhibits to this Current Report on Form&nbsp;8-K and incorporated herein by reference.</FONT></P>
<P id=PARA122 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA123 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Item 3.02&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unregistered Sales of Equity Securities</B></FONT></P>
<P id=PARA124 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA125 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The information set forth in Item 1.01 of this Current Report on Form 8-K is hereby incorporated by reference into this Item 3.02 in its entity. As noted, on August 19, 2016, the Purchasers agreed to exercise Series A Warrants to purchase, in the aggregate, 1,207,332 shares of our common stock, $0.001 par value. The Purchasers also agreed to acquire approximately 3,600,000 shares of our common stock by exercise of Series E Warrants. Upon exercise of the Series A and Series E Warrants, the outstanding common stock will consist of 49,172,733 shares. The common stock was offered and sold pursuant to an exemption from the registration requirements under Section 4(2) of the Securities Act and Rule 506 of Regulation D promulgated thereunder. The agreed upon issuance of the common stock was not registered under the Securities Act and the common stock may not be offered or sold in the United States in the absence of an effective registration statement or exemption from the registration requirements. The resale of the common stock by the Purchasers is currently covered by effective registration statements on Form S-1 (Registration Statement No. 333-180535 with respect to shares acquired upon exercise of Series A Warrants, and Registration Statement No. 333-202897 with respect to shares acquired upon exercise of Series E Warrants).</FONT></P>
<P id=PARA126 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA127 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">This Current Report on Form 8-K shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state.</FONT></P>
<P id=PARA121.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"></FONT>&nbsp;</P>
<P style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px">&nbsp;</P>
<DIV id=PGBK121  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR121  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM121  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;2</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR121  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA80 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA81 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Item 9.01&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits</B></FONT></P>
<P id=PARA82 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA83 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The following exhibit is filed with this Current Report:</FONT></P>
<P id=PARA84 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=TBL87  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 5%; VERTICAL-ALIGN: top">
<P id=PARA85 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">10.1</FONT></P></TD>
<TD style="WIDTH: 95%; VERTICAL-ALIGN: top">
<P id=PARA86 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Form of Agreement to Amend and Exercise Warrants dated August 19, 2016.</FONT></P></TD></TR></TABLE>
<P id=PARA88 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA89.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK89  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR89  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM89  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">3</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR89  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA89.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P>
<P id=PARA93 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>SIGNATURE</B></FONT></P>
<P id=PARA94 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA95 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.</FONT></P>
<P id=PARA96 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA97 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Dated: August 22, 2016</FONT></P>
<P id=PARA98 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=TBL115  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top">
<P id=PARA99 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 38.1%; VERTICAL-ALIGN: top" colSpan=2>
<P id=PARA100 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">GEOVAX LABS, INC.</FONT></P></TD>
<TD style="WIDTH: 11.9%; VERTICAL-ALIGN: top">
<P id=PARA101 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top">
<P id=PARA102 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 38.1%; VERTICAL-ALIGN: top" colSpan=2>&nbsp; </TD>
<TD style="WIDTH: 11.9%; VERTICAL-ALIGN: top">
<P id=PARA103 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top">
<P id=PARA104 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA105 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">By: </FONT></P></TD>
<TD style="WIDTH: 35%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid">
<P id=PARA106 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">/s/ Mark W. Reynolds&nbsp;</FONT></P></TD>
<TD style="WIDTH: 11.9%; VERTICAL-ALIGN: top">
<P id=PARA107 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top">
<P id=PARA108 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA109 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 35%; VERTICAL-ALIGN: bottom">
<P id=PARA110 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Mark W. Reynolds</FONT></P></TD>
<TD style="WIDTH: 11.9%; VERTICAL-ALIGN: top">
<P id=PARA111 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top">&nbsp; </TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA112 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 35%; VERTICAL-ALIGN: top">
<P id=PARA113 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Chief Financial Officer</FONT></P></TD>
<TD style="WIDTH: 11.9%; VERTICAL-ALIGN: middle">
<P id=PARA114 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P></TD></TR></TABLE>
<P id=PARA117 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA118 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA119 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA120 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25">4</P></BODY></HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>ex10-1.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
<HTML><HEAD><TITLE>ex10-1.htm</TITLE>
<!-- Created by RDG HTML Converter -->
</HEAD>
<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; MARGIN-LEFT: 10px; MARGIN-RIGHT: 10px">
<P id=PARA234 style="MARGIN-BOTTOM: 0px; TEXT-ALIGN: right; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>Exhibit 10.1</B></FONT></P>
<P id=PARA235 style="MARGIN-BOTTOM: 0px; TEXT-ALIGN: left; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA1 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>&nbsp;</B></FONT></P>
<P id=PARA2 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>AGREEMENT TO AMEND AND EXERCISE WARRANTS</B></FONT></P>
<P id=PARA3 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA4 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">This Agreement to Amend and Exercise Warrants and Related Matters (the &#8220;<U>Agreement</U>&#8221;), dated as of August 19, 2016, is by and among GeoVax Labs, Inc., a Delaware corporation (the &#8220;<U>Company</U>&#8221;), and the investors listed on the signature pages hereto.</FONT></P>
<P id=PARA5 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA6 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">WHEREAS, pursuant to a Securities Purchase Agreement dated as of March 16, 2012, as amended December 11, 2013 (the &#8220;<U>2012 Purchase Agreement&#8221;</U>), the purchasers thereunder purchased 2,200 shares of the Company&#8217;s Series A Convertible Preferred Stock, as well as Series A Warrants, Series B Warrants, and Series C Warrants to purchase up to an aggregate of 8,799,999 shares of the Company&#8217;s Common Stock, par value $0.001 per share (the &#8220;<U>Common Stock</U>&#8221;);</FONT></P>
<P id=PARA7 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA8 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">WHEREAS, pursuant to a Securities Purchase Agreement dated February 25, 2015 as amended February 15, 2016 (the &#8220;<U>2015 Purchase Agreement</U>&#8221;), among the Company and specified purchasers (the &#8220;<U>2015 Purchasers</U>&#8221;), the 2015 Purchasers were issued 3,000 shares of the Company&#8217;s Series&nbsp;C Convertible Preferred Stock (the &#8220;<U>Series C Stock</U>&#8221;) and Series D Warrants, Series E Warrants, and Series&nbsp;F Warrants (collectively, the &#8220;<U>2015 Warrants</U>&#8221;) to purchase up to an aggregate of 49,999,998 shares of Common Stock, and in the individual amounts set forth below such Purchaser&#8217;s name on the signature pages to the 2015 Purchase Agreement;</FONT></P>
<P id=PARA9 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA10 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">WHEREAS, the Company desires to encourage the holders of Series A Warrants under the 2012 Purchase Agreement who sign this Agreement (the &#8220;<U>2012 Purchasers</U>&#8221;) to exercise the remaining Series A Warrants by agreeing to pay a warrant exercise fee;&nbsp;</FONT></P>
<P id=PARA11 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA12 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">WHEREAS, the 2012 Purchasers wish to receive a warrant exercise fee upon exercise of the Series A Warrants; and</FONT></P>
<P id=PARA13 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA14 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">WHEREAS, the Company desires to encourage the 2015 Purchasers to exercise the Series E Warrants by extending the term of the Series E Warrants as described below.</FONT></P>
<P id=PARA15 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA16 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for good and valuable consideration the receipt and adequacy of which are hereby acknowledged, the Purchasers and the Company agree as follows:</FONT></P>
<P id=PARA17 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA18 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; TEXT-TRANSFORM: uppercase"><B>article I</B></FONT></P>
<P id=PARA19 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; TEXT-TRANSFORM: uppercase"><B>definitions</B></FONT></P>
<P id=PARA20 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA21 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Definitions</U>. Capitalized terms not defined in this Agreement shall have the meanings ascribed to such terms in the 2012 and 2015 Purchase Agreements and in the Certificate of Designation for the Series C Stock filed with the Delaware Secretary of State which authorized the Series&nbsp;C Stock (the &#8220;<U>Series&nbsp;C Certificate of Designation</U>&#8221;), as applicable. The 2012 Purchasers and 2015 Purchasers are also referred to herein as &#8220;Purchasers&#8221;.</FONT></P>
<P id=PARA22 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P>
<P id=PARA23 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>ARTICLE II</B></FONT></P>
<P id=PARA24 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>AMENDMENTS AND OTHER AGREEMENTS</B></FONT></P>
<P id=PARA25 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA26 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Payment of Warrant Exercise Fee Upon Exercise of Series A Warrants</U>. The Series A Warrants entitle the 2012 Purchasers to acquire Common Stock as follows:</FONT></P>
<P id=PARA27 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=TBL37  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 98.1%; MARGIN-LEFT: 0.1%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 45.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA28 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Warrant Holder</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; WIDTH: 24.7%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA29 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Number of Shares</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 29.5%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA30 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Current Exercise Price</B></FONT></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 45.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA31 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Sabby Healthcare Master Fund, Ltd.</FONT></P></TD>
<TD style="WIDTH: 24.7%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA32 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">603,666</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 29.5%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA33 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">$0.09416</FONT></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 45.8%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA34 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Sabby Volatility Warrant Master Fund, Ltd.</FONT></P></TD>
<TD style="WIDTH: 24.7%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA35 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">603,666</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 29.5%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA36 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">$0.09416</FONT></P></TD></TR></TABLE>
<P id=PARA38 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA39 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The 2012 Purchasers agree to promptly exercise their Series A Warrants pursuant to Section 2.3 below. To induce the 2012 Purchasers to exercise the Series A Warrants, the Company agrees to pay to each 2012 Purchaser a warrant exercise fee of $0.02916 for each share purchased by such 2012 Purchaser upon exercise of the Series A Warrants from and after the date hereof. The Company agrees to pay the warrant exercise fees to the applicable 2012 Purchaser within three (3) business days after the Company receives the proceeds from each exercise of Series A Warrants. Such warrant exercise fee shall be paid by wire transfer to the account designated by such 2012 Purchaser. By way of an example, if the Company receives $9,416.00 gross proceeds from a 2012 Purchaser on Series A Warrant exercises, the Company would wire such Purchaser, within 3 business days from the date of exercise of such Series A Warrants, $2,916.00.</FONT></P>
<P id=PARA40 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA236.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK236  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR236  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM236  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR236  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA236.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<P id=PARA41 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Waivers of Antidilution Provisions</U>. Solely to the extent applicable to the exercise of the Series A Warrants and payment of the warrant exercise fee pursuant to Section 2.1 above, each 2012 Purchaser hereby waives the right to an adjustment to the exercise price and/or conversion price, as applicable, pursuant to each of the following, if applicable:</FONT></P>
<P id=PARA42 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA43 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 7(b) of the Series C Certificate of Designation pursuant to Section 8(e) thereof;</FONT></P>
<P id=PARA44 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 3(b) of the Series A Warrants pursuant to Section 5(l) thereof;</FONT></P>
<P id=PARA45 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 3(b) of the Series D Warrants issued February 27, 2015 (the &#8220;<U>Series D Warrants</U>&#8221;) pursuant to Section 5(l) thereof; and</FONT></P>
<P id=PARA46 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section 3(b) of the Series F Warrants issued February 27, 2015 (the &#8220;<U>Series F Warrants</U>&#8221;) pursuant to Section 5(l) thereof.</FONT></P>
<P id=PARA47 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA48 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Furthermore, the 2012 Purchasers hereby confirm, acknowledge and agree that they shall not be entitled to acquire additional shares pursuant to the Series C Certificate of Designation, Series A Warrants, Series D Warrants, Series E Warrants, or Series F Warrants, as a result of the Company&#8217;s agreement to pay the warrant exercise fee upon exercise of Series A Warrants pursuant to this Agreement.</FONT></P>
<P id=PARA49 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA50 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Exercise of Series A Warrants</U>. Promptly after the execution of this Agreement by the parties hereto, the 2012 Purchasers shall submit a Notice of Exercise and exercise all of their Series A Warrants. The exercise price for the Series A Warrants in connection with such exercise shall be paid in cash by means of wire transfer.</FONT></P>
<P id=PARA51 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA52 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Amendment to the Series E Warrants</U>. The first sentence of the first paragraph of the Series&nbsp;E Warrants as amended is hereby further amended to delete the phrase &#8220;the eighteen month anniversary&#8221; and substitute &#8220;[December 31, 2016]&#8221; in lieu thereof.</FONT></P>
<P id=PARA53 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA54 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Payment of Warrant Exercise Fee Upon Exercise of Series E Warrants</U>. The Series&nbsp;E Warrants entitle the 2015 Purchasers to acquire Common Stock as follows:</FONT></P>
<P id=PARA55 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<TABLE id=TBL71  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 30%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA56 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Warrant Holder</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA57 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Grant Date</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA58 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Expiration Date after extension</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA59 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Number of Shares</B></FONT></P></TD>
<TD style="BORDER-TOP: #000000 1px solid; BORDER-RIGHT: #000000 1px solid; WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA60 style="TEXT-ALIGN: left; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; FONT-VARIANT: small-caps"><B>Current Exercise Price</B></FONT></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 30%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA61 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Sabby Healthcare Master Fund, Ltd.</FONT></P></TD>
<TD style="WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA62 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">February 27, 2015</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA63 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">December 31, 2016</FONT></P></TD>
<TD style="WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA64 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">2,801,039</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA65 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">$0.09416</FONT></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 30%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA66 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Sabby Volatility Warrant Master Fund, Ltd.</FONT></P></TD>
<TD style="WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA67 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">February 27, 2015</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 20%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA68 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">December 31, 2016</FONT></P></TD>
<TD style="WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt">
<P id=PARA69 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">2,851,039</FONT></P></TD>
<TD style="BORDER-RIGHT: #000000 1px solid; WIDTH: 15%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid; PADDING-LEFT: 9pt; BORDER-LEFT: #000000 1px solid">
<P id=PARA70 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">$0.09416</FONT></P></TD></TR></TABLE>
<P id=PARA72 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA73 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">The 2015 Purchasers agree to exercise certain of their Series&nbsp;E Warrants pursuant to Section 2.7 below. To induce the 2015 Purchasers to exercise the Series&nbsp;E Warrants, the Company previously agreed to pay to each 2015 Purchaser a warrant exercise fee of $0.02916 for each share purchased by such Purchaser upon all exercises of the Series&nbsp;E Warrants pursuant to the Agreement to Amendment Exercise Series E Warrants and Related Matters dated as of February 15, 2016 (the &#8220;2016 Amendment&#8221;). The Company agreed to pay the warrant exercise fees to the applicable 2015 Purchaser within three (3) business days after the Company receives the proceeds from each exercise of Series&nbsp;E Warrants. Such warrant exercise fee shall be paid by wire transfer to the account designated by such 2015 Purchaser. By way of an example, if the Company receives $9,416.00 gross proceeds from a 2015 Purchaser on Series E Warrant exercises, the Company would wire such 2015 Purchaser, within 3 business days from the date of exercise of such Series E Warrants, $2,916.00. </FONT></P>
<P id=PARA74 style="TEXT-ALIGN: justify; MARGIN: 0pt 0pt 0pt 54pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA75 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Waivers of Antidilution Provisions.</U> Solely to the extent applicable to the exercise and extension of the Series&nbsp;E Warrants and payment of the warrant exercise fee as described at Section 2.5 above, each 2015 Purchaser hereby waives the right to an adjustment to the exercise price and/or conversion price, as applicable, pursuant to each of:</FONT></P>
<P id=PARA76 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA77 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(a) Section 7(b) of the Series C Certificate of Designation pursuant to Section 8(e) thereof; </FONT></P>
<P id=PARA78 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(b) Section 3 (b) of the Series A Warrants originally pursuant to Section 5 (l) thereof;</FONT></P>
<P id=PARA79 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(c) Section 3(b) of the Series D Warrants issued February 27, 2015 (the &#8220;<U>Series D Warrants</U>&#8221;)</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"> </FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">pursuant to Section 5 (l) thereof ; and </FONT></P>
<P id=PARA80 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(d) Section 3(b) of the Series F Warrants issued February 27, 2015 (the &#8220;<U>Series F Warrants</U>&#8221;) pursuant to Section 5 (l) thereof.</FONT></P>
<P id=PARA81 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA237.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK237  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR237  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM237  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR237  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA237.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<P id=PARA82 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Furthermore, the 2015 Purchasers hereby confirm, acknowledge and agree that they shall not be entitled to acquire additional shares pursuant to the Series C Certificate of Designation, Series A Warrants, Series D Warrants, Series&nbsp;E Warrants, or Series&nbsp;F Warrants, as a result of the Company&#8217;s agreement to pay warrant exercise fees and extend the term of the Series E Warrants pursuant to this Agreement. </FONT></P>
<P id=PARA83 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA84 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Exercise of Series E Warrants.</U> Promptly after the execution of this Agreement by the parties hereto, the 2015 Purchasers shall submit a Notice of Exercise and exercise sufficient Series&nbsp;E Warrants such that each of the 2015 Purchasers (collectively with such 2015 Purchaser&#8217;s affiliates) shall thereafter be the beneficial owner of 9.98% of the Company&#8217;s Common Stock (after taking into account the exercise of Series A Warrants pursuant to Section 2.3). The computation of such percentage shall be as provided in Section&nbsp;2&nbsp;(e) of the Series&nbsp;E Warrant. The exercise price for the Series E Warrants in connection with such exercise shall be paid in cash by means of wire transfer so long as a Registration Statement covering the exercise of such Series&nbsp;E Warrants is effective and the prospectus therein available at the time of such exercise. </FONT></P>
<P id=PARA85 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA86 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Purchasers&#8217; Agreement to Give Priority to Exercise of the Series E Warrants. </U>Consistent with the 2016 Amendment, the 2015 Purchasers agree that if, after the exercise of Series E Warrants pursuant to Section 2.7, a Purchaser&#8217;s beneficial ownership shall fall below 9.98% of the Company&#8217;s Common Stock, and such Purchaser shall desire to acquire additional shares of the Company&#8217;s Common Stock, during the term of the Series E Warrants, such Purchaser shall exercise its rights to buy additional shares of such Common Stock pursuant to the Series E Warrants before acquiring such shares pursuant to any other existing right such Purchaser may have to acquire them. For example, the Purchaser shall forego the conversion of Series C Stock, and the exercise of Series&nbsp;D Warrants, or Series F Warrants, until it has acquired all of the shares of the Company&#8217;s Common Stock subject to the Series E Warrant. The provisions of this Section 2.8 shall be null and void in the event either (x)&nbsp;the Company breaches or is in default of its obligations under any Transaction Document, including, without limitation, the timely payment of all warrant exercise fees pursuant to Section 2.1 in connection with all Series A Warrant exercises or (y)&nbsp;there is no effective Registration Statement (or the prospectus therein is not available) covering the resale of the Warrant Shares issuable upon exercise of the Series E Warrants by the Purchasers.</FONT></P>
<P id=PARA87 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA88 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Confirmation of Term of Series&nbsp;F Warrant. </U>The Company and the 2015 Purchasers acknowledge that the exercisability of the Series F Warrants shall vest ratably from time to time in proportion to the holder&#8217;s (or&nbsp;its permitted assigns) exercise of the Series&nbsp;E Warrants as compared with all Series&nbsp;E Warrants issued to the holder on February&nbsp;27, 2015 in connection with the original issuance of the Series&nbsp;E Warrants, provided such exercise occurs during the term of the Series&nbsp;E Warrants, as amended by the 2016 Amendment and this Agreement.</FONT></P>
<P id=PARA89 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA90 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.10.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Effect on Existing Documents.</U> The foregoing agreements, consents and waivers are given solely in respect of the transactions described herein. Except as expressly set forth herein, all of the terms and conditions of the 2012 Purchase Agreement, 2015 Purchase Agreement, Series C Certificate of Incorporation, Series&nbsp;A Warrants, Series&nbsp;D Warrants, Series&nbsp;E Warrants, and Series&nbsp;F. Warrants shall continue in full force and effect after the execution of this Agreement, and shall not be in any other way changed, modified or superseded by the terms set forth herein. </FONT></P>
<P id=PARA91 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA92 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 2.11.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Filing of Form 8-K</U>. By 9:00 am (NY time) on the business day immediately following the date hereof, the Company shall issue a Current Report on Form&nbsp;8-K and a prospectus supplement to the existing Registration Statements, reasonably acceptable to each Purchaser disclosing the material terms of the transactions contemplated hereby, which shall include this Agreement as an attachment thereto.</FONT></P>
<P id=PARA93 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA94 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>ARTICLE III</B></FONT></P>
<P id=PARA95 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>REPRESENTATIONS AND WARRANTIES</B></FONT></P>
<P id=PARA96 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA97 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 3.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Representations and Warranties of the Company</U>. The Company hereby makes the representations and warranties set forth below to the 2012 and 2015 Purchasers that as of the date of its execution of this Agreement:</FONT></P>
<P id=PARA98 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA99 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 79.5pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Authorization; Enforcement.</U> The Company has the requisite corporate power and authority to enter into and to consummate the transactions contemplated by this Agreement and otherwise to carry out its obligations hereunder and thereunder. The execution and delivery of this Agreement by the Company and the consummation by it of the transactions contemplated hereby have been duly authorized by all necessary action on the part of such Company and no further action is required by such Company, its board of directors or its stockholders in connection therewith. This Agreement has been duly executed by the Company and, when delivered in accordance with the terms hereof will constitute the valid and binding obligation of the Company enforceable against the Company in accordance with its terms except (i) as limited by general equitable principles and applicable bankruptcy, insolvency, reorganization, moratorium and other laws of general application affecting enforcement of creditors&#8217; rights generally, (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (iii) insofar as indemnification and contribution provisions may be limited by applicable law.</FONT></P>
<P id=PARA100 style="TEXT-ALIGN: justify; MARGIN: 0pt 0pt 0pt 79.5pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA238.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK238  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR238  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM238  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR238  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA238.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<P id=PARA101 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 79.5pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Outstanding Shares</U>. As of the date hereof, and before the exercise of Series A Warrants and Series E Warrants contemplated by this Agreement, there are 44,365,401 issued and outstanding shares of Common Stock.</FONT></P>
<P id=PARA102 style="TEXT-ALIGN: left; MARGIN: 0pt 0pt 0pt 36pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA103 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA104 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 79.5pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Other Securities</U>. The transactions hereunder will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchasers) and will not result in a right of any holder of Company securities to adjust the exercise, conversion, exchange or reset price under any of such securities. </FONT></P>
<P id=PARA105 style="TEXT-ALIGN: left; MARGIN: 0pt 0pt 0pt 36pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA106 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA107 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 79.5pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Effective Registration</U>. Registration Statement no 333-180535, which registers the resale of the Common Stock issuable upon exercise of the Series A Warrants by the 2012 Purchasers, is effective and the prospectus therein is current and available. Registration Statement no 333-202897, which registers the resale of the Common Stock issuable upon exercise of the Series E Warrants by the Purchasers, is effective and the prospectus therein is current and available.</FONT></P>
<P id=PARA108 style="TEXT-ALIGN: left; MARGIN: 0pt 0pt 0pt 36pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA109 style="MARGIN-BOTTOM: 0pt; MARGIN-TOP: 0pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA110 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 79.5pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">(e)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Equal Consideration</U>. The Company has complied with the provisions of Section 4.13 of the 2012 or 2015 Purchase Agreements in effecting the transactions contemplated hereby. </FONT></P>
<P id=PARA111 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P>
<P id=PARA112 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 3.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Representations and Warranties of the Purchasers.</U> Each Purchaser hereby makes the representations and warranties set forth below to the Company that as of the date of its execution of this Agreement: (i) the execution and delivery of this Agreement by such Purchaser and the consummation by such Purchaser of the transactions contemplated hereby have been duly authorized by all necessary action on such Purchaser&#8217;s behalf and (ii) this Agreement has been duly executed and delivered by such Purchaser and constitutes the valid and binding obligation of such Purchaser, enforceable against such Purchaser in accordance with its terms, except (A) as limited by general equitable principles and applicable bankruptcy, insolvency, reorganization, moratorium and other laws of general application affecting enforcement of creditors&#8217; rights generally, (B) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (C) insofar as indemnification and contribution provisions may be limited by applicable law.</FONT></P>
<P id=PARA113 style="TEXT-ALIGN: justify; MARGIN: 0pt 0pt 0pt 79.5pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>&nbsp;</B></FONT></P>
<P id=PARA114 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>ARTICLE IV</B></FONT></P>
<P id=PARA115 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><B>MISCELLANEOUS</B></FONT></P>
<P id=PARA116 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA117 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Notices</U>. Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be made in accordance with the provisions of the 2012 Purchase Agreement with respect to the Series A Warrants and the 2015 Purchase Agreement with respect to the Series E Warrants (or otherwise related to this Agreement but not the Series A Warrants).</FONT></P>
<P id=PARA118 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA119 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Survival</U>. All warranties and representations (as of the date such warranties and representations were made) made herein or in any certificate or other instrument delivered by it or on its behalf under this Agreement shall be considered to have been relied upon by the parties hereto and shall survive the issuance of Common Stock upon exercise of Series A or Series E Warrants. This Agreement shall inure to the benefit of and be binding upon the successors and permitted assigns of each of the parties; provided however that no party may assign this Agreement or the obligations and rights of such party hereunder without the prior written consent of the other parties hereto.</FONT></P>
<P id=PARA120 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA121 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Execution</U>. This Agreement may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart. In the event that any signature is delivered by facsimile transmission, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the same force and effect as if such facsimile signature page were an original thereof.</FONT></P>
<P id=PARA122 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA239.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK239  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR239  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM239  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR239  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA239.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<P id=PARA123 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Severability</U>. If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby and the parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Agreement.</FONT></P>
<P id=PARA124 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA125 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Governing Law</U>. All questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be determined pursuant to the Governing Law provision of the 2015 Purchase Agreement.</FONT></P>
<P id=PARA126 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA127 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.6.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Entire Agreement</U>. This Agreement, together with any exhibits and schedules thereto, contains the entire understanding of the parties with respect to the subject matter hereof and supersedes all prior agreements and understandings, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules.</FONT></P>
<P id=PARA128 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA129 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Construction</U>. The headings herein are for convenience only, do not constitute<I> </I>a part of this Agreement and shall not be deemed to limit or affect any of the provisions hereof. The language used in this Agreement will be deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party.</FONT></P>
<P id=PARA130 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA131 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Independent Nature of Purchasers&#8217; Obligations and Rights</U>. The obligations of each Purchaser hereunder are several and not joint with the obligations of any other Purchasers hereunder, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser hereunder. Nothing contained herein or in any other agreement or document delivered at any closing, and no action taken by any Purchaser pursuant hereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert with respect to such obligations or the transactions contemplated by this Agreement. Each Purchaser shall be entitled to protect and enforce its rights, including without limitation the rights arising out of this Agreement, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose.</FONT></P>
<P id=PARA132 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA133 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Section 4.9.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Fees and Expenses</U>. Except as expressly set forth herein, each party shall pay the fees and expenses of its advisers, counsel, accountants and other experts, if any, and all other expenses incurred by such party incident to the negotiation, preparation, execution, delivery and performance of this Agreement. The Company shall pay all transfer agent fees, stamp taxes and other taxes and duties levied in connection with the delivery of any Common Stock upon exercise of a Series A Warrant or Series E Warrant.</FONT></P>
<P id=PARA134 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA240.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK240  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR240  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM240  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR240  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA240.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P>
<P id=PARA141 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">IN WITNESS WHEREOF, the parties hereto have caused this Agreement to Amend and Exercise Warrants to be duly executed by their respective authorized signatories as of the date first indicated above.</FONT></P>
<P id=PARA142 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA144 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA145 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;&nbsp;</FONT></P>
<TABLE id=TBL160  style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; WIDTH: 100%; TEXT-INDENT: 0px" cellSpacing=0 cellPadding=0 border=0>

<TR>
<TD style="WIDTH: 49.9%; VERTICAL-ALIGN: top">
<P id=PARA146 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 50%; VERTICAL-ALIGN: top" colSpan=2>
<P id=PARA147 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif; TEXT-TRANSFORM: uppercase"><B>geovax labs, inc.</B></FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 49.9%; VERTICAL-ALIGN: top">
<P id=PARA148 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA149 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 46.9%; VERTICAL-ALIGN: top">
<P id=PARA150 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 49.9%; VERTICAL-ALIGN: top">
<P id=PARA151 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA152 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 46.9%; VERTICAL-ALIGN: top">
<P id=PARA153 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD></TR>
<TR>
<TD style="WIDTH: 49.9%; VERTICAL-ALIGN: top">
<P id=PARA154 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA155 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">By:</FONT></P></TD>
<TD style="WIDTH: 46.9%; VERTICAL-ALIGN: top; BORDER-BOTTOM: #000000 1px solid">&nbsp; </TD></TR>
<TR>
<TD style="WIDTH: 49.9%; VERTICAL-ALIGN: top">
<P id=PARA156 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 3.1%; VERTICAL-ALIGN: top">
<P id=PARA157 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P></TD>
<TD style="WIDTH: 46.9%; VERTICAL-ALIGN: top">
<P id=PARA158 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Name: Robert T. McNally</FONT></P>
<P id=PARA159 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Title: President &amp; CEO</FONT></P></TD></TR></TABLE>
<P id=PARA161 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA162 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA241.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK241  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR241  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM241  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR241  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA241.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT></P>
<P id=PARA169 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">IN WITNESS WHEREOF, the undersigned 2012 Purchaser and 2015 Purchaser has caused this Agreement to Amend and Exercise Warrants to be duly executed by their respective authorized signatories as of the date first indicated above.</FONT></P>
<P id=PARA170 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA171 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA172 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Name of Purchaser: Sabby Volatility Warrant Master Fund, Ltd</FONT></P>
<P id=PARA173 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA174 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><I>Signature of Authorized Signatory of Purchaser</I>:<U> ______________________</U></FONT></P>
<P id=PARA175 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA176 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Name of Authorized Signatory: Robert Grundstein</FONT></P>
<P id=PARA177 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA178 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Title of Authorized Signatory: COO of Investment Manager</FONT></P>
<P id=PARA179 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA180 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Email Address of Purchaser: rgrundstein@sabbycapital.com</FONT></P>
<P id=PARA181 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA182 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA183 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Address for Notice of Purchaser: c/o Sabby Management, LLC</FONT></P>
<P id=PARA184 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA185 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 180pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">10 Mountainview Road, Suite 205</FONT></P>
<P id=PARA186 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA187 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 180pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Upper Saddle River, NJ 07458</FONT></P>
<P id=PARA188 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA189 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA190 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA191 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Address for Delivery of Securities for Purchaser (if not same as above):</FONT></P>
<P id=PARA192 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA193 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA194 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">
<HR style="BORDER-TOP: medium none; HEIGHT: 1px; BORDER-RIGHT: medium none; WIDTH: 100%; BORDER-BOTTOM: medium none; COLOR: #000000;  BORDER-LEFT: medium none; BACKGROUND-COLOR: #000000" align="left">
</FONT></P>
<P id=PARA195 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA196 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA242.1 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT></P>
<DIV id=PGBK242  style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<DIV id=PGFTR242  style="WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<DIV id=PGNUM242  style="FONT-SIZE: 10pt; WIDTH: 100%; TEXT-ALIGN: center">&nbsp;</DIV>
<HR style="HEIGHT: 2px; WIDTH: 100%; PAGE-BREAK-AFTER: always; COLOR: #000000" noShade>

<DIV id=PGHDR242  style="WIDTH: 100%; TEXT-ALIGN: left">&nbsp;</DIV></DIV>
<P id=PARA242.2 style="MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&nbsp;</FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA201 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 36pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">IN WITNESS WHEREOF, the undersigned 2012 Purchaser and 2015 Purchaser has caused this Agreement to Amend and Exercise Warrants to be duly executed by their respective authorized signatories as of the date first indicated above.</FONT></P>
<P id=PARA202 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA203 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA204 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Name of Purchaser: Sabby Healthcare Master Fund, Ltd</FONT></P>
<P id=PARA205 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA206 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"><I>Signature of Authorized Signatory of Purchaser</I>: ________________________</FONT></P>
<P id=PARA207 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA208 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Name of Authorized Signatory: Robert Grundstein</FONT></P>
<P id=PARA209 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA210 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Title of Authorized Signatory: COO of Investment Manager</FONT></P>
<P id=PARA211 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA212 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Email Address of Purchaser: rgrundstein@sabbycapital.com</FONT></P>
<P id=PARA213 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA214 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA215 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Address for Notice of Purchaser: c/o Sabby Management, LLC</FONT></P>
<P id=PARA216 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA217 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 180pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">10 Mountainview Road, Suite 205</FONT></P>
<P id=PARA218 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA219 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25; TEXT-INDENT: 180pt"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Upper Saddle River, NJ 07458</FONT></P>
<P id=PARA220 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA221 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA222 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA223 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">Address for Delivery of Securities for Purchaser (if not same as above):</FONT></P>
<P id=PARA224 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA225 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA226 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA227 style="TEXT-ALIGN: center; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">
<HR style="BORDER-TOP: medium none; HEIGHT: 1px; BORDER-RIGHT: medium none; WIDTH: 100%; BORDER-BOTTOM: medium none; COLOR: #000000;  BORDER-LEFT: medium none; BACKGROUND-COLOR: #000000" align="left">
</FONT></P>
<P id=PARA228 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif">&nbsp;</FONT></P>
<P id=PARA229 style="TEXT-ALIGN: justify; MARGIN: 0pt; LINE-HEIGHT: 1.25"><FONT style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman, Times, serif"></FONT>&nbsp;</P></BODY></HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
