<ARTICLE>                     5
<LEGEND>
     This  schedule  contains  summary  financial   information  extracted  from
MedImmune,  Inc.'s  quarterly  report  on Form  10-Q for the nine  months  ended
September  30, 2000 and is  qualified  in its  entiredty  by  reference  to such
filing.

<CIK>                         0000873591
<NAME>                        MEDIMMUNE, INC.
<MULTIPLIER>                                   1,000

                                             
<PERIOD-TYPE>                                  9-MOS
<FISCAL-YEAR-END>                              Dec-31-2000
<PERIOD-START>                                 Jan-1-2000
<PERIOD-END>                                   Sep-30-2000
<CASH>                                          68,644
<SECURITIES>                                   385,019
<RECEIVABLES>                                   34,647
<ALLOWANCES>                                         0
<INVENTORY>                                     47,892
<CURRENT-ASSETS>                               526,411
<PP&E>                                          88,767
<DEPRECIATION>                                       0
<TOTAL-ASSETS>                                 859,690
<CURRENT-LIABILITIES>                           62,421
<BONDS>                                          9,799
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         2,107
<OTHER-SE>                                     783,405
<TOTAL-LIABILITY-AND-EQUITY>                   859,690
<SALES>                                        268,409
<TOTAL-REVENUES>                               285,204
<CGS>                                           72,816
<TOTAL-COSTS>                                  225,383
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 376
<INCOME-PRETAX>                                 80,327
<INCOME-TAX>                                    25,303
<INCOME-CONTINUING>                             55,024
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    55,024
<EPS-BASIC>                                       0.26
<EPS-DILUTED>                                     0.25