<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from the 
condensed financial statements of T Cell Sciences, Inc. for the Year Ended
December 31, 1997 and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
<CURRENCY>                    US DOLLARS
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                            DEC-31-1997
<PERIOD-START>                               JAN-01-1997
<PERIOD-END>                                 DEC-31-1997
<EXCHANGE-RATE>                                        1
<CASH>                                         6,436,300
<SECURITIES>                                           0
<RECEIVABLES>                                     22,900
<ALLOWANCES>                                           0
<INVENTORY>                                       15,000
<CURRENT-ASSETS>                               7,389,600
<PP&E>                                         3,102,900
<DEPRECIATION>                               (2,738,400)
<TOTAL-ASSETS>                                 9,826,600
<CURRENT-LIABILITIES>                          2,761,100
<BONDS>                                                0
<PREFERRED-MANDATORY>                                  0
<PREFERRED>                                            0
<COMMON>                                          26,500
<OTHER-SE>                                     6,289,000
<TOTAL-LIABILITY-AND-EQUITY>                   9,826,600
<SALES>                                           44,500
<TOTAL-REVENUES>                               1,192,100
<CGS>                                             21,000
<TOTAL-COSTS>                                  8,750,800
<OTHER-EXPENSES>                               6,126,600
<LOSS-PROVISION>                                       0
<INTEREST-EXPENSE>                             (577,300)
<INCOME-PRETAX>                             (13,108,000)
<INCOME-TAX>                                           0
<INCOME-CONTINUING>                         (13,108,000)
<DISCONTINUED>                                         0
<EXTRAORDINARY>                                        0
<CHANGES>                                              0
<NET-INCOME>                                (13,108,000)
<EPS-PRIMARY>                                     (0.52)
<EPS-DILUTED>                                     (0.52)