UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

                                FORM N-PX

           ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED
                      MANAGEMENT INVESTMENT COMPANY


Investment Company Act File Number: 811-21702

Exact name of registrant as specified in charter:

BlackRock Health Sciences Trust

Address of principal executive offices:  100 Bellevue Parkway
                                         Wilmington, DE 19809

Name and address of agent for service:   Robert S. Kapito, President
                                         40 East 52nd Street
                                         New York, New York 10022

Registrant's telephone number, including area code:  (888) 825-2257

Date of fiscal year end: 10/31

Date of reporting period: 07/01/2006 - 06/30/2007

Item 1 - PROXY VOTING RECORD -

The information contained herein discloses the following information for each
matter relating to a portfolio security considered at any shareholder meeting
held during the period covered by the report and with respect to which the
registrant was entitled to vote:

(a)  The name of the issuer of the portfolio security;

(b)  The exchange ticker symbol of the portfolio security;

(c)  The Council on Uniform Securities Identification Procedures ("CUSIP")
     number for the portfolio security;

(d)  The shareholder meeting date;

(e)  A brief identification of the matter voted on;

(f)  Whether the matter was proposed by the issuer or by a security holder;

(g)  Whether the registrant cast its vote on the matter;

(h)  How the registrant cast its vote; and

(i)  Whether the registrant cast its vote for or against management.


******************************* FORM N-Px REPORT *******************************

ICA File Number: 811-21702
Reporting Period: 07/01/2006 - 06/30/2007
BlackRock Health Sciences Trust









======================= BLACKROCK HEALTH SCIENCES TRUST ========================


ABBOTT LABORATORIES

Ticker:       ABT            Security ID:  002824100
Meeting Date: APR 27, 2007   Meeting Type: Annual
Record Date:  FEB 28, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director R.S. Austin                For       For        Management
1.2   Elect Director W.M. Daley                 For       For        Management
1.3   Elect Director W.J. Farrell               For       For        Management
1.4   Elect Director H.L. Fuller                For       For        Management
1.5   Elect Director R.A. Gonzalez              For       For        Management
1.6   Elect Director D.A.L. Owen                For       For        Management
1.7   Elect Director B. Powell Jr.              For       For        Management
1.8   Elect Director W.A. Reynolds              For       For        Management
1.9   Elect Director R.S. Roberts               For       For        Management
1.10  Elect Director S.C. Scott III             For       For        Management
1.11  Elect Director W.D. Smithburg             For       For        Management
1.12  Elect Director G.F. Tilton                For       For        Management
1.13  Elect Director M.D. White                 For       For        Management
2     Ratify Auditors                           For       For        Management
3     Advisory Vote to Ratify Named Executive   Against   For        Shareholder
      Officers' Compensation
4     Separate Chairman and CEO Positions       Against   Against    Shareholder


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AETNA INC.

Ticker:       AET            Security ID:  00817Y108
Meeting Date: APR 27, 2007   Meeting Type: Annual
Record Date:  FEB 23, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Frank M. Clark             For       For        Management
1.2   Elect Director Betsy Z. Cohen             For       For        Management
1.3   Elect Director Molly J. Coye, M.D.        For       For        Management
1.4   Elect Director Barbara Hackman Franklin   For       For        Management
1.5   Elect Director Jeffrey E. Garten          For       For        Management
1.6   Elect Director Earl G. Graves, Sr.        For       For        Management
1.7   Elect Director Gerald Greenwald           For       For        Management
1.8   Elect Director Ellen M. Hancock           For       For        Management
1.9   Elect Director Edward J. Ludwig           For       For        Management
1.10  Elect Director Joseph P. Newhouse         For       For        Management
1.11  Elect Director Ronald A. Williams         For       For        Management
2     Ratify Auditors                           For       For        Management
3     Company Specific-Majority Vote Standard   For       For        Management
      for the Election of Directors in
      Uncontested Election
4     Restore or Provide for Cumulative Voting  Against   Against    Shareholder
5     Require Director Nominee Qualifications   Against   Against    Shareholder


--------------------------------------------------------------------------------

ALCON INC.

Ticker:       ACL            Security ID:  H01301102
Meeting Date: MAY 9, 2007    Meeting Type: Annual
Record Date:  MAR 26, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     APPROVAL OF THE 2006 ANNUAL REPORT AND    For       For        Management
      ACCOUNTS OF ALCON, INC. AND THE 2006
      CONSOLIDATED FINANCIAL STATEMENTS OF
      ALCON, INC. AND SUBSIDIARIES
2     APPROPRIATION OF AVAILABLE EARNINGS AND   For       For        Management
      PROPOSED DIVIDEND TO SHAREHOLDERS FOR THE
      FINANCIAL YEAR 2006
3     DISCHARGE OF THE MEMBERS OF THE BOARD OF  For       For        Management
      DIRECTORS FOR THE FINANCIAL YEAR 2006
4     ELECTION OF KPMG KLYNVELD PEAT MARWICK    For       For        Management
      GOERDELER SA, ZURICH, AS GROUP AND PARENT
      COMPANY AUDITORS
5     ELECTION OF ZENSOR REVISIONS AG, ZUG, AS  For       For        Management
      SPECIAL AUDITORS
6     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      WERNER J. BAUER
7     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      FRANCISCO CASTANER
8     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      LODEWIJK J.R. DE VINK
9     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      GERHARD N. MAYR
10    APPROVAL OF SHARE CANCELLATION            For       For        Management


--------------------------------------------------------------------------------

ALEXION PHARMACEUTICALS, INC.

Ticker:       ALXN           Security ID:  015351109
Meeting Date: MAY 3, 2007    Meeting Type: Annual
Record Date:  MAR 13, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Leonard Bell, M.D.         For       Withhold   Management
1.2   Elect Director David W. Keiser            For       Withhold   Management
1.3   Elect Director Max Link, Ph.D.            For       Withhold   Management
1.4   Elect Director Joseph A. Madri, Ph.D.,    For       Withhold   Management
      M.D.
1.5   Elect Director Larry L. Mathis            For       Withhold   Management
1.6   Elect Director R. Douglas Norby           For       Withhold   Management
1.7   Elect Director Alvin S. Parven            For       Withhold   Management
1.8   Elect Director Ruedi E. Waeger, Ph.D.     For       Withhold   Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

ALLERGAN, INC.

Ticker:       AGN            Security ID:  018490102
Meeting Date: SEP 20, 2006   Meeting Type: Special
Record Date:  AUG 14, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Increase Authorized Common Stock          For       For        Management


--------------------------------------------------------------------------------

AMGEN, INC.

Ticker:       AMGN           Security ID:  031162100
Meeting Date: MAY 9, 2007    Meeting Type: Annual
Record Date:  MAR 12, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Frank J. Biondi, Jr.       For       For        Management
2     Elect Director Jerry D. Choate            For       For        Management
3     Elect Director Frank C. Herringer         For       For        Management
4     Elect Director Gilbert S. Omenn           For       For        Management
5     Ratify Auditors                           For       For        Management
6     Declassify the Board of Directors         For       For        Management
7     Declassify the Board of Directors         For       For        Management
8     Develop an Animal Welfare Policy          Against   Against    Shareholder
9     Prepare a Sustainability Report           Against   Against    Shareholder


--------------------------------------------------------------------------------

APPLERA CORP

Ticker:       ABI            Security ID:  038020202
Meeting Date: OCT 19, 2006   Meeting Type: Annual
Record Date:  AUG 30, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Richard H. Ayers           For       For        Management
1.2   Elect Director Jean-Luc Belingard         For       For        Management
1.3   Elect Director Robert H. Hayes            For       For        Management
1.4   Elect Director Arnold J. Levine           For       For        Management
1.5   Elect Director William H. Longfield       For       For        Management
1.6   Elect Director Theodore E. Martin         For       For        Management
1.7   Elect Director Carolyn W. Slayman         For       For        Management
1.8   Elect Director Orin R. Smith              For       For        Management
1.9   Elect Director James R. Tobin             For       For        Management
1.10  Elect Director Tony L. White              For       For        Management
2     Ratify Auditors                           For       For        Management
3     Change Company Name                       For       For        Management
4     Amend Omnibus Stock Plan                  For       For        Management
5     Amend Omnibus Stock Plan                  For       For        Management


--------------------------------------------------------------------------------

BAXTER INTERNATIONAL INC.

Ticker:       BAX            Security ID:  071813109
Meeting Date: MAY 1, 2007    Meeting Type: Annual
Record Date:  MAR 2, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Blake E. Devitt            For       For        Management
2     Elect Director John D. Forsyth            For       For        Management
3     Elect Director Gail D. Fosler             For       For        Management
4     Elect Director Carole J. Shapazian        For       For        Management
5     Ratify Auditors                           For       For        Management
6     Approve Omnibus Stock Plan                For       For        Management


--------------------------------------------------------------------------------

BECTON, DICKINSON AND COMPANY

Ticker:       BDX            Security ID:  075887109
Meeting Date: JAN 30, 2007   Meeting Type: Annual
Record Date:  DEC 6, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Claire Fraser-Liggett      For       For        Management
1.2   Elect Director Henry P. Becton, Jr.       For       For        Management
1.3   Elect Director Edward F. Degraan          For       For        Management
1.4   Elect Director Adel A.F. Mahmoud          For       For        Management
1.5   Elect Director James F. Orr               For       For        Management
2     Ratify Auditors                           For       For        Management
3     Amend Omnibus Stock Plan                  For       For        Management
4     Restore or Provide for Cumulative Voting  Against   Against    Shareholder


--------------------------------------------------------------------------------

BIOGEN IDEC INC.

Ticker:       BIIB           Security ID:  09062X103
Meeting Date: MAY 31, 2007   Meeting Type: Annual
Record Date:  APR 13, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director James C. Mullem            For       For        Management
1.2   Elect Director Bruce R. Ross              For       For        Management
1.3   Elect Director Marijn E. Dekkers          For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

BIOMARIN PHARMACEUTICAL INC.

Ticker:       BMRN           Security ID:  09061G101
Meeting Date: JUN 7, 2007    Meeting Type: Annual
Record Date:  APR 16, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Jean-Jacques Bienaime      For       For        Management
1.2   Elect Director Michael Grey               For       For        Management
1.3   Elect Director Elaine J. Heron            For       For        Management
1.4   Elect Director Joseph Klein, III          For       For        Management
1.5   Elect Director Pierre Lapalme             For       For        Management
1.6   Elect Director V. Bryan Lawlis            For       For        Management
1.7   Elect Director Alan J. Lewis              For       For        Management
1.8   Elect Director Richard A. Meier           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Increase Authorized Common Stock          For       For        Management


--------------------------------------------------------------------------------

BIOMET, INC.

Ticker:       BMET           Security ID:  090613100
Meeting Date: JUN 8, 2007    Meeting Type: Special
Record Date:  APR 20, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Approve Merger Agreement                  For       For        Management
2     Adjourn Meeting                           For       For        Management


--------------------------------------------------------------------------------

CARDIOME PHARMA CORP.

Ticker:       COM            Security ID:  14159U202
Meeting Date: JUN 11, 2007   Meeting Type: Annual/Special
Record Date:  MAY 2, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Robert W. Rieder           For       For        Management
1.2   Elect Director Peter W. Roberts           For       For        Management
1.3   Elect Director Jackie Clegg               For       For        Management
1.4   Elect Director Richard M. Glickman        For       For        Management
1.5   Elect Director Harold H. Shlevin          For       For        Management
1.6   Elect Director Douglas G. Janzen          For       For        Management
1.7   Elect Director William L. Hunter          For       For        Management
2     Ratify KPMG LLP as Auditors               For       For        Management
3     Authorize Board to Fix Remuneration of    For       For        Management
      Auditors
4     Amend Stock Option Plan                   For       Against    Management


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CHINA MEDICAL TECHNOLOGIES INC.

Ticker:       CMED           Security ID:  169483104
Meeting Date: NOV 21, 2006   Meeting Type: Annual
Record Date:  AUG 25, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Ratify Auditors                           For       For        Management


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COOPER COMPANIES, INC., THE

Ticker:       COO            Security ID:  216648402
Meeting Date: MAR 20, 2007   Meeting Type: Annual
Record Date:  FEB 5, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director A. Thomas Bender           For       For        Management
1.2   Elect Director John D. Fruth              For       For        Management
1.3   Elect Director Michael H. Kalkstein       For       For        Management
1.4   Elect Director Jody S. Lindell            For       For        Management
1.5   Elect Director Moses Marx                 For       For        Management
1.6   Elect Director Donald Press               For       For        Management
1.7   Elect Director Steven Rosenberg           For       For        Management
1.8   Elect Director Allan E. Rubenstein, M.D.  For       For        Management
1.9   Elect Director Robert S. Weiss            For       For        Management
1.10  Elect Director Stanley Zinberg, M.D.      For       For        Management
2     Ratify Auditors                           For       For        Management
3     Approve Omnibus Stock Plan                For       For        Management


--------------------------------------------------------------------------------

CV THERAPEUTICS INC.

Ticker:       CVTX           Security ID:  126667104
Meeting Date: MAY 31, 2007   Meeting Type: Annual
Record Date:  APR 16, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Thomas L. Gutshall         For       For        Management
1.2   Elect Director Kenneth B. Lee, Jr.        For       For        Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

CYBERONICS, INC.

Ticker:       CYBX           Security ID:  23251P102
Meeting Date: FEB 1, 2007    Meeting Type: Proxy Contest
Record Date:  DEC 18, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Stanley H. Appel, M.D.     For       Did Not    Management
                                                          Vote
1.2   Elect Director Tony Coelho                For       Did Not    Management
                                                          Vote
1.3   Elect Director Guy C. Jackson             For       Did Not    Management
                                                          Vote
1.4   Elect Director Kevin S. Moore             For       Did Not    Management
                                                          Vote
1.5   Elect Director Hugh M. Morrison           For       Did Not    Management
                                                          Vote
1.6   Elect Director Alan Olsen                 For       Did Not    Management
                                                          Vote
1.7   Elect Director M.J. Strauss, M.D., MPH    For       Did Not    Management
                                                          Vote
1.8   Elect Director Reese S. Terry, Jr.        For       Did Not    Management
                                                          Vote
2     Ratify Auditors                           For       Did Not    Management
                                                          Vote
1.1   Elect Director Alfred J. Novak            For       Withhold   Management
1.2   Elect Director Arthur L. Rosenthal        For       For        Management
1.3   Elect Director Jeffrey E. Schwarz         For       For        Management
2     Ratify Auditors                           For       For        Management


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DENTSPLY INTERNATIONAL, INC.

Ticker:       XRAY           Security ID:  249030107
Meeting Date: MAY 15, 2007   Meeting Type: Annual
Record Date:  MAR 27, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Paula H. Cholmondeley      For       For        Management
1.2   Elect Director Michael J. Coleman         For       For        Management
1.3   Elect Director John C. Miles II           For       For        Management
1.4   Elect Director W. Keith Smith             For       For        Management
2     Ratify Auditors                           For       For        Management
3     Amend Omnibus Stock Plan                  For       For        Management


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EDWARDS LIFESCIENCES CORPORATION

Ticker:       EW             Security ID:  28176E108
Meeting Date: MAY 10, 2007   Meeting Type: Annual
Record Date:  MAR 16, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Robert A. Ingram           For       For        Management
1.2   Elect Director Vernon R. Loucks Jr.       For       For        Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Amend Qualified Employee Stock Purchase   For       For        Management
      Plan
4     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

GENENTECH, INC.

Ticker:       DNA            Security ID:  368710406
Meeting Date: APR 20, 2007   Meeting Type: Annual
Record Date:  FEB 20, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Herbert W. Boyer, Ph.D.    For       For        Management
1.2   Elect Director William M. Burns           For       Withhold   Management
1.3   Elect Director Erich Hunziker, Ph.D.      For       Withhold   Management
1.4   Elect Director Jonathan K.C. Knowles,     For       Withhold   Management
      Ph.D.
1.5   Elect Director Arthur D. Levinson, Ph.D.  For       For        Management
1.6   Elect Director Debra L. Reed              For       For        Management
1.7   Elect Director Charles A. Sanders, M.D.   For       For        Management
2     Ratify Auditors                           For       For        Management


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GILEAD SCIENCES, INC.

Ticker:       GILD           Security ID:  375558103
Meeting Date: MAY 9, 2007    Meeting Type: Annual
Record Date:  MAR 22, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Paul Berg                  For       For        Management
1.2   Elect Director John F. Cogan              For       For        Management
1.3   Elect Director Etienne F. Davignon        For       Withhold   Management
1.4   Elect Director James M. Denny             For       For        Management
1.5   Elect Director Carla A. Hills             For       For        Management
1.6   Elect Director John W. Madigan            For       For        Management
1.7   Elect Director John C. Martin             For       For        Management
1.8   Elect Director Gordon E. Moore            For       For        Management
1.9   Elect Director Nicholas Moore             For       For        Management
1.10  Elect Director Gayle E. Wilson            For       For        Management
2     Ratify Auditors                           For       For        Management
3     Amend Omnibus Stock Plan                  For       For        Management
4     Amend Qualified Employee Stock Purchase   For       For        Management
      Plan


--------------------------------------------------------------------------------

ICOS CORP.

Ticker:       ICOS           Security ID:  449295104
Meeting Date: JAN 25, 2007   Meeting Type: Special
Record Date:  DEC 26, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Approve Merger Agreement                  For       For        Management
2     Adjourn Meeting                           For       For        Management


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INTEGRA LIFESCIENCES HOLDINGS CORP.

Ticker:       IART           Security ID:  457985208
Meeting Date: MAY 17, 2007   Meeting Type: Annual
Record Date:  MAR 30, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Thomas J. Baltimore, Jr.   For       For        Management
2     Elect Director Keith Bradley              For       For        Management
3     Elect Director Richard E. Caruso          For       For        Management
4     Elect Director Stuart M. Essig            For       For        Management
5     Elect Director Neal Moszkowski            For       For        Management
6     Elect Director Christian S. Schade        For       For        Management
7     Elect Director James M. Sullivan          For       For        Management
8     Elect Director Anne M. Vanlent            For       For        Management
9     Ratify Auditors                           For       For        Management


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INTERMUNE, INC.

Ticker:       ITMN           Security ID:  45884X103
Meeting Date: MAY 15, 2007   Meeting Type: Annual
Record Date:  MAR 19, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director David S. Kabakoff, Ph.D.   For       For        Management
1.2   Elect Director Michael L. Smith           For       For        Management
1.3   Elect Director Daniel G. Welch            For       For        Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

JOHNSON & JOHNSON

Ticker:       JNJ            Security ID:  478160104
Meeting Date: APR 26, 2007   Meeting Type: Annual
Record Date:  FEB 27, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Mary Sue Coleman           For       For        Management
1.2   Elect Director James G. Cullen            For       For        Management
1.3   Elect Director Michael M.E. Johns         For       For        Management
1.4   Elect Director Arnold G. Langbo           For       For        Management
1.5   Elect Director Susan L. Lindquist         For       For        Management
1.6   Elect Director Leo F. Mullin              For       For        Management
1.7   Elect Director Christine A. Poon          For       For        Management
1.8   Elect Director Charles Prince             For       For        Management
1.9   Elect Director Steven S Reinemund         For       For        Management
1.10  Elect Director David Satcher              For       For        Management
1.11  Elect Director William C. Weldon          For       For        Management
2     Ratify Auditors                           For       For        Management
3     Require a Majority Vote for the Election  Against   For        Shareholder
      of Directors
4     Submit Supplemental Executive Retirement  Against   For        Shareholder
      Plans to Shareholder vote


--------------------------------------------------------------------------------

KOSAN BIOSCIENCES INC.

Ticker:       KOSN           Security ID:  50064W107
Meeting Date: MAY 24, 2007   Meeting Type: Annual
Record Date:  MAR 30, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Charles J. Homcy, M.D.     For       For        Management
1.2   Elect Director Chaitan S. Khosla, Ph.D.   For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

MANOR CARE, INC.

Ticker:       HCR            Security ID:  564055101
Meeting Date: MAY 8, 2007    Meeting Type: Annual
Record Date:  MAR 16, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Mary Taylor Behrens        For       For        Management
2     Elect Director Joseph F. Damico           For       For        Management
3     Elect Director Stephen L. Guillard        For       For        Management
4     Elect Director William H. Longfield       For       For        Management
5     Elect Director Paul A. Ormond             For       For        Management
6     Elect Director John T. Schwieters         For       For        Management
7     Elect Director Richard C. Tuttle          For       For        Management
8     Elect Director Gail R. Wilensky, Ph.D     For       For        Management
9     Elect Director Thomas L. Young            For       For        Management


--------------------------------------------------------------------------------

MERCK & CO., INC.

Ticker:       MRK            Security ID:  589331107
Meeting Date: APR 24, 2007   Meeting Type: Annual
Record Date:  FEB 23, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Richard T. Clark           For       For        Management
1.2   Elect Director Johnnetta B. Cole, Ph.D.   For       For        Management
1.3   Elect Director William B. Harrison, Jr.   For       For        Management
1.4   Elect Director William N. Kelley, M.D.    For       For        Management
1.5   Elect Director Rochelle B. Lazarus        For       For        Management
1.6   Elect Director Thomas E. Shenk, Ph.D.     For       For        Management
1.7   Elect Director Anne M. Tatlock            For       For        Management
1.8   Elect Director Samuel O. Thier, M.D.      For       For        Management
1.9   Elect Director Wendell P. Weeks           For       For        Management
1.10  Elect Director Peter C. Wendell           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Reduce Supermajority Vote Requirement     For       For        Management
4     Reduce Supermajority Vote Requirement     For       For        Management
5     Establish Range For Board Size            For       For        Management
6     Replace Cumulative Voting to Majority     For       For        Management
      Vote Standard for the Election of
      Directors
7     Publish Political Contributions           Against   Against    Shareholder
8     Advisory Vote to Ratify Named Executive   Against   For        Shareholder
      Officers' Compensation


--------------------------------------------------------------------------------

MYRIAD GENETICS, INC.

Ticker:       MYGN           Security ID:  62855J104
Meeting Date: NOV 16, 2006   Meeting Type: Annual
Record Date:  SEP 29, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Robert S. Attiyeh          For       For        Management
1.2   Elect Director John T. Henderson, M.D.    For       For        Management
2     Amend Stock Option Plan                   For       For        Management
3     Amend Qualified Employee Stock Purchase   For       For        Management
      Plan
4     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

NOVARTIS AG

Ticker:       NVS            Security ID:  66987V109
Meeting Date: MAR 6, 2007    Meeting Type: Annual
Record Date:  JAN 19, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     APPROVAL OF THE ANNUAL REPORT, THE        For       For        Management
      FINANCIAL STATEMENTS OF NOVARTIS AG AND
      THE GROUP CONSOLIDATED FINANCIAL
      STATEMENTS FOR THE YEAR 2006.
2     APPROVAL OF THE ACTIVITIES OF THE BOARD   For       For        Management
      OF DIRECTORS
3     APPROPRIATION OF AVAILABLE EARNINGS OF    For       For        Management
      NOVARTIS AG AS PER BALANCE SHEET AND
      DECLARATION OF DIVIDEND
4     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      RE-ELECTION OF HANS-JOERG RUDLOFF FOR A
      THREE-YEAR TERM
5     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      RE-ELECTION OF DR. DANIEL VASELLA FOR A
      THREE-YEAR TERM
6     ELECTION TO THE BOARD OF DIRECTORS:       For       For        Management
      ELECTION OF NEW MEMBER MARJORIE M. YANG
      FOR A TERM OF OFFICE BEGINNING ON 1
      JANUARY 2008 AND ENDING ON THE DAY OF THE
      AGM IN 2010
7     Ratify Auditors                           For       For        Management
8     VOTES REGARDING ADDITIONAL AND/OR         For       Against    Management
      COUNTER-PROPOSALS AT THE AGM OF NOVARTIS
      AG IF YOU GIVE NO INSTRUCTIONS ON AGENDA
      ITEM 6, YOUR VOTES WILL BE CAST IN
      ACCORDANCE WITH THE PROPOSALS OF THE
      BOARD OF DIRECTORS. MARKING THE BOX  FOR
      IS A VOTE FOR THE PROPOS


--------------------------------------------------------------------------------

PFIZER INC.

Ticker:       PFE            Security ID:  717081103
Meeting Date: APR 26, 2007   Meeting Type: Annual
Record Date:  MAR 1, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Dennis A. Ausiello         For       For        Management
1.2   Elect Director Michael S. Brown           For       For        Management
1.3   Elect Director M. Anthony Burns           For       For        Management
1.4   Elect Director Robert N. Burt             For       For        Management
1.5   Elect Director W. Don Cornwell            For       For        Management
1.6   Elect Director William H. Gray, III       For       For        Management
1.7   Elect Director Constance J. Horner        For       For        Management
1.8   Elect Director William R. Howell          For       For        Management
1.9   Elect Director Jeffrey B. Kindler         For       For        Management
1.10  Elect Director George A. Lorch            For       For        Management
1.11  Elect Director Dana G. Mead               For       For        Management
1.12  Elect Director William C. Steere, Jr.     For       For        Management
2     Ratify Auditors                           For       For        Management
3     Restore or Provide for Cumulative Voting  Against   For        Shareholder
4     Report on Animal Testing Policies         Against   Against    Shareholder
5     Amend Animal Welfare Policy               Against   Against    Shareholder
6     Require Director Nominee Qualifications   Against   Against    Shareholder


--------------------------------------------------------------------------------

REGENERON PHARMACEUTICALS, INC.

Ticker:       REGN           Security ID:  75886F107
Meeting Date: JUN 8, 2007    Meeting Type: Annual
Record Date:  APR 12, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Leonard S. Schleifer       For       For        Management
1.2   Elect Director Eric M. Shooter            For       For        Management
1.3   Elect Director George D. Yancopoulos      For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

RESPIRONICS, INC.

Ticker:       RESP           Security ID:  761230101
Meeting Date: NOV 14, 2006   Meeting Type: Annual
Record Date:  SEP 29, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Joseph C. Lawyer           For       For        Management
1.2   Elect Director Sean C. Mcdonald           For       For        Management
1.3   Elect Director Mylle H. Mangum            For       For        Management
1.4   Elect Director John C. Miles Ii           For       For        Management
2     Ratify Auditors                           For       For        Management
3     Approve Qualified Employee Stock Purchase For       For        Management
      Plan


--------------------------------------------------------------------------------

SCHERING-PLOUGH CORP.

Ticker:       SGP            Security ID:  806605101
Meeting Date: MAY 18, 2007   Meeting Type: Annual
Record Date:  MAR 28, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Hans W. Becherer           For       For        Management
1.2   Elect Director Thomas J. Colligan         For       For        Management
1.3   Elect Director Fred Hassan                For       For        Management
1.4   Elect Director C. Robert Kidder           For       For        Management
1.5   Elect Director Philip Leder, M.D.         For       For        Management
1.6   Elect Director Eugene R. McGrath          For       For        Management
1.7   Elect Director Carl E. Mundy, Jr.         For       For        Management
1.8   Elect Director Antonio M. Perez           For       For        Management
1.9   Elect Director Patricia F. Russo          For       For        Management
1.10  Elect Director Jack L. Stahl              For       For        Management
1.11  Elect Director Kathryn C. Turner          For       For        Management
1.12  Elect Director Robert F.W. van Oordt      For       For        Management
1.13  Elect Director Arthur F. Weinbach         For       For        Management
2     Ratify Auditors                           For       For        Management
3     Reduce Supermajority Vote Requirement     For       For        Management
4     Company Specific--Adopt Majority Voting   For       Against    Management
5     Performance-Based and/or Time-Based       Against   For        Shareholder
      Equity Awards


--------------------------------------------------------------------------------

SEATTLE GENETICS, INC.

Ticker:       SGEN           Security ID:  812578102
Meeting Date: MAY 25, 2007   Meeting Type: Annual
Record Date:  MAR 29, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Marc E. Lippman, M.D.      For       For        Management
1.2   Elect Director Franklin M. Berger         For       For        Management
2     Approve Omnibus Stock Plan                For       Against    Management
3     Amend Non-Employee Director Stock Option  For       For        Management
      Plan
4     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

SHIRE PLC (FORMERLY SHIRE PHARMACEUTICALS GROUP PLC)

Ticker:       SHPGY          Security ID:  82481R106
Meeting Date: APR 16, 2007   Meeting Type: Special
Record Date:  MAR 20, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     TO APPROVE THE ACQUISITION BY THE COMPANY For       For        Management
      OF NEW RIVER  PHARMACEUTICALS, INC. AND
      APPROVE THE INCREASE IN THE BORROWING
      LIMITS OF THE COMPANY.


--------------------------------------------------------------------------------

ST. JUDE MEDICAL, INC.

Ticker:       STJ            Security ID:  790849103
Meeting Date: MAY 16, 2007   Meeting Type: Annual
Record Date:  MAR 19, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Michael A. Rocca           For       For        Management
1.2   Elect Director Stefan K. Widensohler      For       For        Management
2     Approve Omnibus Stock Plan                For       For        Management
3     Approve Qualified Employee Stock Purchase For       For        Management
      Plan
4     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

STRYKER CORP.

Ticker:       SYK            Security ID:  863667101
Meeting Date: APR 25, 2007   Meeting Type: Annual
Record Date:  FEB 28, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John W. Brown              For       For        Management
1.2   Elect Director Howard E. Cox, Jr.         For       For        Management
1.3   Elect Director Donald M. Engelman, Ph.D.  For       For        Management
1.4   Elect Director Jerome H. Grossman, M.D.   For       For        Management
1.5   Elect Director Louise L. Francesconi      For       For        Management
1.6   Elect Director Stephen P. Macmillan       For       For        Management
1.7   Elect Director William U. Parfet          For       For        Management
1.8   Elect Director Ronda E. Stryker           For       For        Management
2     Approve Executive Incentive Bonus Plan    For       For        Management
3     Ratify Auditors                           For       For        Management
4     Performance-Based and/or Time-Based       Against   Against    Shareholder
      Equity Awards


--------------------------------------------------------------------------------

THORATEC CORP.

Ticker:       THOR           Security ID:  885175307
Meeting Date: MAY 18, 2007   Meeting Type: Annual
Record Date:  MAR 30, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Gerhard F. Burbach         For       For        Management
1.2   Elect Director Howard E. Chase            For       For        Management
1.3   Elect Director J. Daniel Cole             For       For        Management
1.4   Elect Director Neil F. Dimick             For       For        Management
1.5   Elect Director D. Keith Grossman          For       For        Management
1.6   Elect Director J. Donald Hill, M.D.       For       For        Management
1.7   Elect Director Daniel M. Mulvena          For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

UNITED THERAPEUTICS CORP.

Ticker:       UTHR           Security ID:  91307C102
Meeting Date: JUN 26, 2007   Meeting Type: Annual
Record Date:  MAY 1, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Christopher Causey         For       For        Management
1.2   Elect Director R. Paul Gray               For       For        Management


--------------------------------------------------------------------------------

UNITEDHEALTH GROUP INCORPORATED

Ticker:       UNH            Security ID:  91324P102
Meeting Date: MAY 29, 2007   Meeting Type: Annual
Record Date:  APR 9, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director William C. Ballard, Jr.    For       For        Management
1.2   Elect Director Richard T. Burke           For       For        Management
1.3   Elect Director Stephen J. Hemsley         For       For        Management
1.4   Elect Director Robert J. Darretta         For       For        Management
2     Company Specific--Majority Vote for the   For       For        Management
      Election of Directors
3     Declassify the Board of Directors         For       For        Management
4     Reduce Supermajority Vote Requirement for For       For        Management
      Removal of Directors
5     Reduce Supermajority Vote Requirement     For       For        Management
6     Amend Articles-Make Stylistic, Clarifying For       For        Management
      and Conforming Changes
7     Ratify Auditors                           For       For        Management
8     Performance-Based and/or Time-Based       Against   Against    Shareholder
      Equity Awards
9     Establish SERP Policy                     Against   For        Shareholder
10    Advisory Vote to Ratify Named Executive   Against   For        Shareholder
      Officers' Compensation
11    Equal Access to the Proxy for Purpose of  Against   For        Shareholder
      Electing a Director


--------------------------------------------------------------------------------

VARIAN MEDICAL SYSTEMS INC

Ticker:       VAR            Security ID:  92220P105
Meeting Date: FEB 15, 2007   Meeting Type: Annual
Record Date:  DEC 18, 2006

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director John Seely Brown           For       For        Management
1.2   Elect Director R. Andrew Eckert           For       For        Management
1.3   Elect Director Mark R. Laret              For       For        Management
1.4   Elect Director Kent J. Thiry              For       For        Management
2     Amend Omnibus Stock Plan                  For       For        Management
3     Amend Executive Incentive Bonus Plan      For       For        Management
4     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

VENTANA MEDICAL SYSTEMS, INC.

Ticker:       VMSI           Security ID:  92276H106
Meeting Date: MAY 23, 2007   Meeting Type: Annual
Record Date:  MAR 26, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Ratify Auditors                           For       For        Management
2.1   Elect Director Rod Dammeyer               For       For        Management
2.2   Elect Director Christopher Gleeson        For       For        Management
2.3   Elect Director Edward Giles               For       For        Management


--------------------------------------------------------------------------------

WATERS CORPORATION

Ticker:       WAT            Security ID:  941848103
Meeting Date: MAY 15, 2007   Meeting Type: Annual
Record Date:  MAR 20, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director Joshua Bekenstein          For       For        Management
1.2   Elect Director Michael J. Berendt, Ph.D.  For       For        Management
1.3   Elect Director Douglas A. Berthiaume      For       For        Management
1.4   Elect Director Edward Conard              For       For        Management
1.5   Elect Director Laurie H. Glimcher, M.D.   For       For        Management
1.6   Elect Director Christopher A. Kuebler     For       For        Management
1.7   Elect Director William J. Miller          For       For        Management
1.8   Elect Director JoAnn A. Reed              For       For        Management
1.9   Elect Director Thomas P. Salice           For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

WRIGHT MEDICAL GROUP

Ticker:       WMGI           Security ID:  98235T107
Meeting Date: MAY 17, 2007   Meeting Type: Annual
Record Date:  MAR 26, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect Director F. Barry Bays              For       For        Management
1.2   Elect Director Martin J. Emerson          For       For        Management
1.3   Elect Director Lawrence W. Hamilton       For       For        Management
1.4   Elect Director Gary D. Henley             For       For        Management
1.5   Elect Director John L. Miclot             For       For        Management
1.6   Elect Director Robert J. Quillinan        For       For        Management
1.7   Elect Director David D. Stevens           For       For        Management
1.8   Elect Director Thomas E. Timbie           For       For        Management
1.9   Elect Director James T. Treace            For       For        Management
2     Ratify Auditors                           For       For        Management


--------------------------------------------------------------------------------

WYETH

Ticker:       WYE            Security ID:  983024100
Meeting Date: APR 26, 2007   Meeting Type: Annual
Record Date:  MAR 2, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Robert Essner              For       For        Management
2     Elect Director John D. Feerick            For       For        Management
3     Elect Director Frances D. Fergusson       For       For        Management
4     Elect Director Victor F. Ganzi            For       For        Management
5     Elect Director Robert Langer              For       For        Management
6     Elect Director John P. Mascotte           For       For        Management
7     Elect Director Raymond J. McGuire         For       For        Management
8     Elect Director Mary Lake Polan            For       For        Management
9     Elect Director Bernard Poussot            For       For        Management
10    Elect Director Gary L. Rogers             For       For        Management
11    Elect Director Ivan G. Seidenberg         For       For        Management
12    Elect Director Walter V. Shipley          For       For        Management
13    Elect Director John R. Torell III         For       For        Management
14    Ratify Auditors                           For       For        Management
15    Reduce Supermajority Vote Requirement     For       For        Management
16    Amend Omnibus Stock Plan                  For       For        Management
17    Adopt Animal Welfare Policy               Against   Against    Shareholder
18    Report on Policy to Limit Drug Supply to  Against   For        Shareholder
      Canada
19    Report on Political Contributions         Against   For        Shareholder
20    Claw-back of Payments under Restatements  Against   For        Shareholder
21    Company-Specific - Interlocking           Against   Against    Shareholder
      Directorship
22    Disclose Information-Proposal Withdrawn.  Against   Abstain    Shareholder
      No Vote Required
23    Separate Chairman and CEO Positions       Against   For        Shareholder
24    Advisory Vote to Ratify Named Executive   Against   For        Shareholder
      Officers' Compensation


--------------------------------------------------------------------------------

XOMA LTD.

Ticker:       XOMA           Security ID:  G9825R107
Meeting Date: MAY 22, 2007   Meeting Type: Annual
Record Date:  MAR 30, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1.1   Elect  Director James G. Andress          For       For        Management
1.2   Elect  Director William K. Bowes, Jr.     For       For        Management
1.3   Elect  Director John L. Castello          For       For        Management
1.4   Elect  Director Peter Barton Hutt         For       For        Management
1.5   Elect  Director P.J. Scannon, Md, Ph.D.   For       For        Management
1.6   Elect  Director W. Denman Van Ness        For       For        Management
1.7   Elect  Director Patrick J. Zenner         For       For        Management
2     Ratify Auditors                           For       For        Management
3     PROPOSAL TO APPROVE THE ADOPTION OF THE   For       For        Management
      COMPANY S BONUS COMPENSATION PLAN.


--------------------------------------------------------------------------------

ZIMMER HOLDINGS INC

Ticker:       ZMH            Security ID:  98956P102
Meeting Date: MAY 7, 2007    Meeting Type: Annual
Record Date:  MAR 8, 2007

#     Proposal                                  Mgt Rec   Vote Cast  Sponsor
1     Elect Director Larry C. Glasscock         For       For        Management
2     Elect Director John L. McGoldrick         For       For        Management
3     Ratify Auditors                           For       For        Management
4     Declassify the Board of Directors         For       For        Management
5     Adopt Simple Majority Vote                Against   For        Shareholder

========== END NPX REPORT


- SIGNATURES -

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

BlackRock Health Sciences Trust

By:     /s/ Robert S. Kapito
       ---------------------
       Robert S. Kapito
       Principal Executive Officer


Date: August 24, 2007