<SEC-DOCUMENT>0001752724-20-049299.txt : 20200313
<SEC-HEADER>0001752724-20-049299.hdr.sgml : 20200313
<ACCEPTANCE-DATETIME>20200313162245
ACCESSION NUMBER:		0001752724-20-049299
CONFORMED SUBMISSION TYPE:	N-CEN
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20191231
FILED AS OF DATE:		20200313
DATE AS OF CHANGE:		20200313
EFFECTIVENESS DATE:		20200313

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BlackRock Health Sciences Trust
		CENTRAL INDEX KEY:			0001314966
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		N-CEN
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-21702
		FILM NUMBER:		20713000

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		(888) 825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
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            <custodyType>Futures commission merchants and commodity clearing organizations - rule 17f-6 (17 CFR 270.17f-6)</custodyType>
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          <custodian>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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        <aggregateCommission>114767.28</aggregateCommission>
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      </managementInvestmentQuestion>
    </managementInvestmentQuestionSeriesInfo>
    <closedEndManagementInvestment>
      <securityRelatedItems>
        <securityRelatedItem>
          <description>Common stock</description>
          <securityClassTitle>BlackRock Health Sciences Trust</securityClassTitle>
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            <commonStock commonStockExchange="XNYS" commonStockTickerSymbol="BME"/>
          </commonStocks>
        </securityRelatedItem>
      </securityRelatedItems>
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        <secondaryOfferingType>Common stock</secondaryOfferingType>
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      <isRepurchaseSecurity>N</isRepurchaseSecurity>
      <isDefaultLongTermDebt>N</isDefaultLongTermDebt>
      <isDividendsInArrears>N</isDividendsInArrears>
      <isSecuritiesModified>N</isSecuritiesModified>
      <managementFee>1</managementFee>
      <netOperatingExpenses>1.09</netOperatingExpenses>
      <marketPricePerShare>42.50000000</marketPricePerShare>
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      <isIPAReportInternalControl>true</isIPAReportInternalControl>
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    <signature registrantSignedName="BlackRock Health Sciences Trust" signedDate="2020-03-05" signature="Ann Frechette" title="Assistant Treasurer"/>
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</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>NCEN_6326088411367621.txt
<TEXT>
REPORT OF INDEPENDENT REGISTERED PUBLIC
ACCOUNTING FIRM

To the Shareholders and Board of Trustees/Directors of
BlackRock Energy and Resources Trust, BlackRock
Enhanced Capital and Income Fund, Inc., BlackRock
Enhanced Equity Dividend Trust, BlackRock Enhanced
Global Dividend Trust, BlackRock Enhanced International
Dividend Trust, BlackRock Health Sciences Trust,
BlackRock Resources & Commodities Strategy Trust,
BlackRock Science and Technology Trust, BlackRock
Science and Technology Trust II, and BlackRock Utilities,
Infrastructure & Power Opportunities Trust:

In planning and performing our audit of the financial statements
of BlackRock Energy and Resources Trust, BlackRock
Enhanced Capital and Income Fund, Inc., BlackRock Enhanced
Equity Dividend Trust, BlackRock Enhanced Global Dividend
Trust, BlackRock Enhanced International Dividend Trust,
BlackRock Health Sciences Trust, BlackRock Science and
Technology Trust, BlackRock Science and Technology Trust
II, and BlackRock Utilities, Infrastructure & Power
Opportunities Trust (the "Funds") as of and for the year ended
December 31, 2019, in accordance with the standards of the
Public Company Accounting Oversight Board (United States)
(PCAOB), we considered the Funds' internal control over
financial reporting, including controls over safeguarding
securities, as a basis for designing our auditing procedures for
the purpose of expressing our opinion on the financial
statements and to comply with the requirements of Form N-
CEN, but not for the purpose of expressing an opinion on the
effectiveness of the Funds' internal control over financial
reporting. Accordingly, we express no such opinion.

The management of the Funds is responsible for establishing
and maintaining effective internal control over financial
reporting. In fulfilling this responsibility, estimates and
judgments by management are required to assess the expected
benefits and related costs of controls. A company's internal
control over financial reporting is a process designed to provide
reasonable assurance regarding the reliability of financial
reporting and the preparation of financial statements for
external purposes in accordance with generally accepted
accounting principles. A company's internal control over
financial reporting includes those policies and procedures that
(1) pertain to the maintenance of records that, in reasonable
detail, accurately and fairly reflect the transactions and
dispositions of the assets of the company; (2) provide
reasonable assurance that transactions are recorded as necessary
to permit preparation of financial statements in accordance with
generally accepted accounting principles, and that receipts and
expenditures of the company are being made only in
accordance with authorizations of management and directors of
the company; and (3) provide reasonable assurance regarding
prevention or timely detection of unauthorized acquisition, use,
or disposition of a company's assets that could have a material
effect on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect misstatements.
Also, projections of any evaluation of effectiveness to future
periods are subject to the risk that controls may become
inadequate because of changes in conditions or that the degree
of compliance with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting exists
when the design or operation of a control does not allow
management or employees, in the normal course of performing
their assigned functions, to prevent or detect misstatements on a
timely basis. A material weakness is a deficiency, or a
combination of deficiencies, in internal control over financial
reporting, such that there is a reasonable possibility that a
material misstatement of the company's annual or interim
financial statements will not be prevented or detected on a
timely basis.

Our consideration of the Funds' internal control over financial
reporting was for the limited purpose described in the first
paragraph and would not necessarily disclose all deficiencies in
internal control that might be material weaknesses under
standards established by the PCAOB. However, we noted no
deficiencies in the Funds' internal control over financial
reporting and its operation, including controls for safeguarding
securities, that we consider to be a material weakness, as
defined above, as of December 31, 2019.

This report is intended solely for the information and use of
management and the Board of Trustees/Directors of the Funds
and the Securities and Exchange Commission and is not
intended to be and should not be used by anyone other than
these specified parties.

Deloitte & Touche LLP
Boston, Massachusetts
February 25, 2020







</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
