SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K


                             Current Report Pursuant
                          to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported) February 27, 2003

                             BOSTON BIOMEDICA, INC.
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             (Exact Name Of Registrant As Specified In Its Charter)

                                  MASSACHUSETTS
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                 (State or Other Jurisdiction of Incorporation)

               0-21615                                 04-2652826
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        (Commission File Number)            (I.R.S. Employer Identification No.)

  375 WEST STREET, WEST BRIDGEWATER, MA                   02379
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 (Address of Principal Executive Offices)               (Zip Code)

                                 (508) 580-1900
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              (Registrant's Telephone Number, Including Area Code)

                                       N/A
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          (Former Name or Former Address, if Changed Since Last Report)



ITEM 5.   OTHER EVENTS.

     On February 27, 2003, the Board of Directors of Boston Biomedica, Inc. (the
"Company") declared a dividend of one preferred share purchase right (a "Right")
for each outstanding share of common stock of the Company (the "Common Shares")
on March 21, 2003 (the "Record Date") to the stockholders of record on that
date. Each Right entitles the registered holder to purchase from the Company one
one-thousandth of a share of Series A Junior Participating Preferred Stock, par
value $0.01 per share (the "Preferred Shares"), of the Company, at a price of
$45.00 per one one-thousandth of a Preferred Share (the "Purchase Price"),
subject to adjustment. The description and terms of the Rights are set forth in
the Rights Agreement, dated as of February 27, 2003 as the same may be amended
from time to time (the "Rights Agreement") between the Company and Computershare
Trust Company, Inc., as Rights Agent (the "Rights Agent").

     Until the earlier to occur of (i) 10 days following a public announcement
that a person or group of affiliated or associated persons has acquired
beneficial ownership of 15% or more of the outstanding Common Shares or any
person or group who as of February 27, 2003 beneficially owned 15% or more of
the outstanding Common Shares acquired beneficial ownership of any additional
Common Shares (with certain exceptions, an "Acquiring Person") or (ii) 10
business days (or such later date as may be determined by action of the Board of
Directors prior to such time as any Person becomes an Acquiring Person)
following the commencement of, or announcement of an intention to make, a tender
offer or exchange offer the consummation of which would result in the beneficial
ownership by a person or group of 15% or more of such outstanding Common Shares
(the earlier of such dates being called the "Distribution Date"), the Rights
will be evidenced, with respect to any of the Common Share certificates
outstanding as of the Record Date, by such Common Share certificate with a copy
of the Summary of Rights attached thereto.

     This Rights Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights), new
Common Share certificates issued after the Record Date or upon transfer or new
issuance of Common Shares will contain a notation incorporating the Rights
Agreement by reference. Until the Distribution Date (or earlier redemption or
expiration of the Rights), the surrender for transfer of any certificates for
Common Shares outstanding as of the Record Date, even without such notation or a
copy of the Summary of Rights being attached thereto, will also constitute the
transfer of the Rights associated with the Common Shares represented by such
certificate. As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Shares as of the Close of Business on the
Distribution Date and such separate Right Certificates alone will evidence the
Rights.

     The Rights are not exercisable until the Distribution Date. The Rights will
expire on February 27, 2013 (the "Final Expiration Date"), unless the Final
Expiration Date is advanced or extended or unless the Rights are earlier
redeemed or exchanged by the Company, in each case, as described below.



     The Purchase Price payable, and the number of Preferred Shares or other
securities or property issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, less than
the then current market price of the Preferred Shares or (iii) upon the
distribution to holders of the Preferred Shares of evidences of indebtedness or
assets (excluding regular periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).

     The number of outstanding Rights and the number of one one-thousandths of a
Preferred Share issuable upon exercise of each Right are also subject to
adjustment in the event of a stock split of the Common Shares or a stock
dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

     Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a quarterly dividend
payment of 1000 times the dividend declared per Common Share. In the event of
liquidation, the holders of the Preferred Shares will be entitled to an
aggregate payment of 1000 times the aggregate payment made per Common Share.
Each Preferred Share will have 1000 votes, voting together with the Common
Shares. In the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
1000 times the amount received per Common Share. These rights are protected by
customary antidilution provisions.

     Because of the nature of the Preferred Shares' dividend, liquidation and
voting rights, the value of the one one-thousandth interest in a Preferred Share
purchasable upon exercise of each Right should approximate the value of one
Common Share.

     In the event that any person becomes an Acquiring Person, each holder of a
Right, other than Rights beneficially owned by the Acquiring Person and its
Affiliates and Associates (which will thereafter be void), will thereafter have
the right to receive upon exercise that number of Common Shares having a market
value of two times the exercise price of the Right. In the event that, at any
time after a Person becomes an Acquiring Person, the Company is acquired in a
merger or other business combination transaction or 50% or more of its
consolidated assets or earning power are sold, proper provision will be made so
that each holder of a Right will thereafter have the right to receive, upon the
exercise thereof at the then current exercise price of the Right, that number of
shares of common stock of the person with whom the Company has engaged in the
foregoing transaction (or its parent) which at the time of such transaction will
have a market value of two times the exercise price of the Right.

     If the Company does not have sufficient Common Shares to satisfy such
obligation to issue Common Shares, or if the Board of Directors so elects, the
Company shall deliver upon payment of the exercise price of a Right an amount of
cash or securities or other assets equivalent in value to the Common Shares
issuable upon exercise of a Right; provided that, if the Company



fails to meet such obligation within 30 days following the first occurrence of
an event triggering the right to purchase Common Shares, the Company must
deliver, upon exercise of a Right but without requiring payment of the exercise
price then in effect, Common Shares (to the extent available) and then, if
necessary Preferred Shares (to the extent available) and then, if necessary,
cash equal in value to the difference between the value of the Common Shares
otherwise issuable upon the exercise of a Right and the exercise price then in
effect. The Board of Directors may extend the 30-day period described above for
up to an additional 60 days to permit the taking of action that may be necessary
to authorize sufficient additional Common Shares to permit the issuance of
Common Shares upon the exercise in full of the Rights.

     At any time after any Person becomes an Acquiring Person and prior to the
acquisition by any person or group of a majority of the outstanding Common
Shares, the Board of Directors of the Company may exchange the Rights (other
than Rights owned by such person or group which have become void), in whole or
in part, for Common Shares or Preferred Shares at an exchange ratio of one
Common Share, or a fractional Preferred Share (or other preferred stock)
equivalent in value thereto, per Right (subject to adjustment).

     With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares or Common Shares will be
issued (other than fractions which are integral multiples of one one-thousandth
of a Preferred Share, which may, at the election of the Company, be evidenced by
depositary receipts) and in lieu thereof, an adjustment in cash will be made
based on the current market price of the Preferred Shares or the Common Shares.

     At any time prior to the time any Person becomes an Acquiring Person, the
Board of Directors of the Company may redeem the Rights in whole, but not in
part, at a price of $0.001 per Right (the "Redemption Price") payable, at the
option of the Company, in cash, shares of Common Stock or such other form of
consideration as the Board of Directors of the Company shall determine. The
redemption of the Rights may be made effective at such time, on such basis and
with such conditions as the Board of Directors in its sole discretion may
establish. Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

     For so long as the Rights are then redeemable, the Company may, except with
respect to the Redemption Price, amend the Rights Agreement in any manner. After
the Rights are no longer redeemable, the Company may, except with respect to the
Redemption Price, amend the Rights Agreement in any manner that does not
adversely affect the interests of holders of the Rights.

     Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

     The Rights Agreement is attached hereto as an exhibit and is incorporated
herein by reference. This summary description of the Rights does not purport to
be complete and is qualified in its entirety by reference to the Rights
Agreement.



ITEM 7.   FINANCIAL STATEMENTS AND EXHIBITS.

Exhibit 4   Rights Agreement between the Registrant and Computershare Trust
            Company, Inc., as Rights Agent, dated February 27, 2003.

Exhibit 99  Press Release of the Registrant dated March 3, 2002.



                                    SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this Report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Dated: March 11, 2003            BOSTON BIOMEDICA, INC.


                                 By:    /s/ Kevin Quinlan
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                                    Kevin Quinlan, President, Chief Operating
                                     Officer, and Treasurer