<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED FINANCIAL STATEMENTS OF T CELL SCIENCES, INC. FOR THE SIX MONTHS ENDED
JUNE 30, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<EXCHANGE-RATE>                                      1
<CASH>                                      10,671,300
<SECURITIES>                                         0
<RECEIVABLES>                                   17,600
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                            10,963,400
<PP&E>                                       3,083,100
<DEPRECIATION>                             (2,639,600)
<TOTAL-ASSETS>                              13,385,200
<CURRENT-LIABILITIES>                        1,379,900
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        25,000
<OTHER-SE>                                  11,980,300
<TOTAL-LIABILITY-AND-EQUITY>                13,385,200
<SALES>                                          1,300
<TOTAL-REVENUES>                               756,700
<CGS>                                              400
<TOTAL-COSTS>                                4,688,500
<OTHER-EXPENSES>                                17,900
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           (333,700)
<INCOME-PRETAX>                            (3,616,400)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (3,616,400)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (3,616,400)
<EPS-PRIMARY>                                   (0.14)
<EPS-DILUTED>                                   (0.14)