<SEC-DOCUMENT>0001752724-21-053040.txt : 20210315
<SEC-HEADER>0001752724-21-053040.hdr.sgml : 20210315
<ACCEPTANCE-DATETIME>20210315171528
ACCESSION NUMBER:		0001752724-21-053040
CONFORMED SUBMISSION TYPE:	N-CEN
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210315
DATE AS OF CHANGE:		20210315
EFFECTIVENESS DATE:		20210315

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:		21742473

	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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        <chiefComplianceOfficer>
          <ccoName>Charles Park</ccoName>
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          <ccoStreet1>55 East 52nd Street</ccoStreet1>
          <ccoCity>New York</ccoCity>
          <ccoStateCountry ccoCountry="US" ccoState="US-NY"/>
          <ccoZipCode>10055</ccoZipCode>
          <ccoPhone>XXXXXX</ccoPhone>
          <isCcoChangedSinceLastFiling>N</isCcoChangedSinceLastFiling>
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            <ccoEmployer ccoEmployerName="N/A" ccoEmployerId="N/A"/>
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      </chiefComplianceOfficers>
      <securityMatterSeriesInfo isRegistrantSubmittedMatter="Y">
        <seriesInfo seriesName="N/A" seriesId="N/A"/>
      </securityMatterSeriesInfo>
      <isPreviousLegalProceeding>N</isPreviousLegalProceeding>
      <isPreviousProceedingTerminated>N</isPreviousProceedingTerminated>
      <isClaimFiled>N</isClaimFiled>
      <coveredByInsurancePolicy isCoveredByInsurancePolicy="Y" isClaimFiledDuringPeriod="N"/>
      <isFinancialSupportDuringPeriod>N</isFinancialSupportDuringPeriod>
      <releaseNumbers isExemptionFromAct="Y">
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        <principalUnderwriter>
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          <isPrincipalUnderwriterAffiliatedWithRegistrant>Y</isPrincipalUnderwriterAffiliatedWithRegistrant>
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      </principalUnderwriters>
      <isUnderwriterHiredOrTerminated>N</isUnderwriterHiredOrTerminated>
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        <publicAccountant>
          <publicAccountantName>Deloitte &amp; Touche LLP</publicAccountantName>
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      <isMaterialWeakness>N</isMaterialWeakness>
      <isOpinionOffered>N</isOpinionOffered>
      <isMaterialChange>N</isMaterialChange>
      <isAccountingPrincipleChange>N</isAccountingPrincipleChange>
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        <seriesInfo seriesName="N/A" seriesId="N/A"/>
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    <managementInvestmentQuestionSeriesInfo>
      <managementInvestmentQuestion>
        <mgmtInvFundName>BlackRock Health Sciences Trust</mgmtInvFundName>
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        <fundType>N/A</fundType>
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        <isForeignSubsidiary>N</isForeignSubsidiary>
        <isFundSecuritiesLending>Y</isFundSecuritiesLending>
        <fundLendSecurities didFundLendSecurities="Y">
          <isFundLiquidated>N</isFundLiquidated>
          <isFundAdverselyImpacted>N</isFundAdverselyImpacted>
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        <securityLendings>
          <securityLending>
            <securitiesAgentName>BlackRock Investment Management, LLC</securitiesAgentName>
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            <securityAgentIdemnity isSecurityAgentIdemnity="Y">
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                <idemnityProvider idemnityProviderName="N/A" idemnityProviderLei="N/A"/>
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              <didIndemnificationRights>N</didIndemnificationRights>
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        </securityLendings>
        <paymentToAgentManagers>
          <paymentToAgentManagerType>Cash collateral reinvestment fee</paymentToAgentManagerType>
          <paymentToAgentManagerType>Other</paymentToAgentManagerType>
          <paymentToAgentManagerType>Revenue sharing split</paymentToAgentManagerType>
          <otherFeeDesc>Rebates paid to borrowers</otherFeeDesc>
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        <relyOnRuleTypes>
          <relyOnRuleType>Rule 12d1-1 (17 CFR 270.12d1-1)</relyOnRuleType>
          <relyOnRuleType>Rule 32a-4 (17 CFR 270.32a-4)</relyOnRuleType>
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        <isExpenseLimitationInPlace>Y</isExpenseLimitationInPlace>
        <isExpenseReducedOrWaived>Y</isExpenseReducedOrWaived>
        <isFeesWaivedRecoupable>N</isFeesWaivedRecoupable>
        <isExpenseWaivedRecoupable>N</isExpenseWaivedRecoupable>
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          <investmentAdviser>
            <investmentAdviserName>BlackRock Advisors, LLC</investmentAdviserName>
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          <transferAgent>
            <transferAgentName>Computershare Trust Company, National Association</transferAgentName>
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            <isTransferAgentSubAgent>N</isTransferAgentSubAgent>
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        <isTransferAgentHiredOrTerminated>N</isTransferAgentHiredOrTerminated>
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            <pricingServiceName>IHS Markit Ltd.</pricingServiceName>
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          <pricingService>
            <pricingServiceName>ICE Data Services, Inc.</pricingServiceName>
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          <pricingService>
            <pricingServiceName>Bloomberg L.P.</pricingServiceName>
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            <isPricingServiceAffiliated>N</isPricingServiceAffiliated>
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          <pricingService>
            <pricingServiceName>Refinitiv US Holdings Inc.</pricingServiceName>
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        <isPricingServiceHiredOrTerminated>N</isPricingServiceHiredOrTerminated>
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            <isCustodianAffiliated>N</isCustodianAffiliated>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodianName>Standard Chartered Bank (Hong Kong) Limited</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
            <custodianName>Mizuho Bank, Ltd. (Minato ku, Tokyo, JP, Branch)</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodianName>Deutsche Bank Aktiengesellschaft (Mumbai, Maharashtra, IN, Branch)</custodianName>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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            <custodianCountry>CA</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
            <custodianName>Barclays Capital Inc.</custodianName>
            <custodianLei>AC28XWWI3WIBK2824319</custodianLei>
            <custodianStateCountry custodianState="US-NY" custodianCountry="US"/>
            <isCustodianAffiliated>N</isCustodianAffiliated>
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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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            <custodianName>Euroclear Bank</custodianName>
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            <custodianCountry>BE</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
            <isSubCustodian>Y</isSubCustodian>
            <custodyType>Foreign securities depository - rule 17f-7 (17 CFR 270.17f-7)</custodyType>
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          <custodian>
            <custodianName>Credit Suisse (Schweiz) AG</custodianName>
            <custodianLei>549300CWR0W0BCS9Q144</custodianLei>
            <custodianCountry>CH</custodianCountry>
            <isCustodianAffiliated>N</isCustodianAffiliated>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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          <custodian>
            <custodianName>State Street Bank International GmbH</custodianName>
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            <isCustodianAffiliated>N</isCustodianAffiliated>
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            <custodyType>Foreign custodian - rule 17f-5 (17 CFR 270.17f-5)</custodyType>
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        <isCustodianHiredOrTerminated>Y</isCustodianHiredOrTerminated>
        <isShareholderServiceHiredTerminated>N</isShareholderServiceHiredTerminated>
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          <admin>
            <adminName>State Street Bank and Trust Company</adminName>
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            <adminStateCountry adminState="US-MA" adminCountry="US"/>
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            <isAdminSubAdmin>Y</isAdminSubAdmin>
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          <admin>
            <adminName>BlackRock Advisors, LLC</adminName>
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            <isAdminAffiliated>Y</isAdminAffiliated>
            <isAdminSubAdmin>N</isAdminSubAdmin>
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        </admins>
        <isAdminHiredOrTerminated>N</isAdminHiredOrTerminated>
        <brokerDealers>
          <brokerDealer>
            <brokerDealerName>BlackRock Investments, LLC</brokerDealerName>
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</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>NCEN_8769844667449707.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 Health Sciences Trust II, 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 audits 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 Health Sciences Trust II, BlackRock
Resources & Commodities Strategy 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 period
ended December 31, 2020, 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, 2020.
This report is intended solely for the information and use of
management and the 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 23, 2021






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