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



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549

                                    FORM 10-Q

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


{X} QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
                                  ACT OF 1934


                For the quarterly period ended September 30, 1999

                           Commission File No. 0-19131




                                 MedImmune, Inc.
             (Exact name of registrant as specified in its charter)


           Delaware                               52-1555759
(State or other jurisdiction of                (I. R. S. Employer
  incorporation or organization)               Identification No.)



                35 West Watkins Mill Road, Gaithersburg, MD 20878
               (Address of principal executive offices) (Zip Code)



Registrant's telephone number, including area code (301)417-0770


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports)  and  (2)  has  been  subject  to such  filing
requirements for the past 90 days. Yes [X] No [ ]

As of September 30, 1999, 63,277,737 shares of Common Stock, par value $0.01 per
share, were outstanding.







                                 MEDIMMUNE, INC.
                               Index to Form 10-Q



                                                                                    


Part I   Financial Information                                                           Page

         Item 1.   Financial Statements

                      Balance Sheets                                                       1
                      Statements of Operations                                             3
                      Condensed Statements of Cash Flows                                   4
                      Notes to Financial Statements                                        5-8

         Item 2.      Management's Discussion and Analysis of  Financial Condition
                      and Results of Operations                                            9-13

Part II   Other Information                                                                14-15

         Item 1.       Legal Proceedings

         Item 2.       Changes in Securities

         Item 3.       Defaults upon Senior Securities

         Item 4.       Submission of Matters to a Vote of Security Holders

         Item 5.       Other Information

         Item 6.       Exhibits and Reports on Form 8-K


CytoGam, RespiGam, and Synagis are registered trademarks of the Company.










ITEM 1.  FINANCIAL STATEMENTS


                                 MEDIMMUNE, INC.
                                 BALANCE SHEETS




(in thousands, except share data)

                                                    September 30,   December 31,
                                                        1999          1998
                                                      ---------    ---------
                                                            
ASSETS:                                              (Unaudited)
  Cash and cash equivalents                          $   9,366    $  37,959
  Marketable securities                                149,944       96,923
  Trade receivables, net                                21,421       31,682
  Contract receivables, net                              2,290        3,155
  Inventory, net                                        22,446       19,760
 Deferred tax assets                                    12,547       22,595
 Other current assets                                    7,495        4,292
                                                     ---------    ---------
  Total Current Assets                                 225,509      216,366

  Property and equipment, net                           81,575       74,822
  Inventory, noncurrent                                  6,227        4,949
  Deferred tax assets                                   96,259       54,923
  Other assets                                           6,838        2,060
                                                     ---------    ---------
   Total Assets                                      $ 416,408    $ 353,120
                                                     =========    =========
LIABILITIES AND SHAREHOLDERS' EQUITY:
  Accounts payable                                   $   4,189    $   4,052
  Accrued expenses                                      24,358       33,397
  Product royalties payable                              7,933       14,948
  Accrued interest                                         419        2,580
  Other current liabilities                              2,627        2,993
                                                     ---------    ---------
  Total Current Liabilities                             39,526       57,970

  Long-term debt                                        17,489       83,195
  Other liabilities                                      2,049        2,122
                                                     ---------    ---------
  Total Liabilities                                     59,064      143,287
                                                     ---------    ---------
  Commitments and Contingencies

SHAREHOLDERS' EQUITY:
  Preferred stock, $.01 par value; authorized
  5,524,525 shares; none issued or outstanding              --           --
  Common stock, $.01 par value; authorized
  120,000,000 shares; issued and outstanding
   63,277,737 at September 30, 1999 and
  54,654,842 at December 31, 1998                          633          547
  Paid-in capital                                      413,130      289,318
  Accumulated deficit                                  (56,419)     (80,032)
                                                     ---------    ---------
  Total Shareholders' Equity                           357,344      209,833
                                                     ---------    ---------
  Total Liabilities and Shareholders' Equity         $ 416,408    $ 353,120
                                                     =========    =========

The accompanying notes are an integral part of these financial statements.









                                                                MEDIMMUNE, INC
                                                            STATEMENTS OF OPERATIONS
                                                                  (Unaudited)

(in thousands except per share data)

                                                                             For the                  For the
                                                                        three months ended        nine months ended
                                                                           September 30,            September 30,

                                                                                                  

                                                                      1999         1998         1999         1998
                                                                     ---------    ---------    ---------    ---------
Revenues:
   Product sales                                                     $  32,201    $  22,181    $ 167,397    $  73,224
   Other                                                                16,710        1,659       20,474       34,545
                                                                     ---------    ---------    ---------    ---------
   Total revenues                                                       48,911       23,840      187,871      107,769
                                                                     ---------    ---------    ---------    ---------
Costs and Expenses:
   Cost of sales                                                        10,828        6,903       46,649       43,661
   Research and  development                                            10,214        5,766       27,849       18,761
   Selling, administrative and general                                  18,315       14,286       65,230       30,430
   Other operating expenses                                              4,429        8,509       16,313       33,447
                                                                     ---------    ---------    ---------    ---------
     Total expenses                                                     43,786       35,464      156,041      126,299
                                                                     ---------    ---------    ---------    ---------
Operating income (loss)                                                  5,125      (11,624)      31,830      (18,530)
   Interest income                                                       2,287        1,615        7,050        5,176
   Interest expense                                                       (499)      (1,043)      (2,332)      (3,061)
                                                                     ---------    ---------    ---------    ---------
 Income (loss) before income taxes                                       6,913      (11,052)      36,548      (16,415)
 Provision for income taxes                                              1,774           --       12,935           --
                                                                     ---------    ---------    ---------    ---------
    Net earnings (loss)                                              $   5,139    ($ 11,052)   $  23,613    ($ 16,415)
                                                                     =========    =========    =========    =========
    Basic earnings per share (loss)                                  $    0.08    ($   0.21)   $    0.41    ($   0.31)
                                                                     =========    =========    =========    =========
Shares used in calculation of basic earnings  (loss)
per share                                                               62,890       53,310       58,041       52,754
                                                                     =========    =========    =========    =========
Diluted earnings (loss) per share                                    $    0.08    ($   0.21)   $    0.37    ($   0.31)
                                                                     =========    =========    =========    =========
Shares used in calculation of diluted
earnings (loss) per share                                               67,036       53,310       66,213       52,754
                                                                     =========    =========    =========    =========


The accompanying notes are an integral part of these financial statements.










                                 MEDIMMUNE, INC.
                       CONDENSED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
(in thousands)
                                                                        For the
                                                                   nine months ended
                                                                     September 30,
                                                                          
                                                                  1999           1998
                                                                --------       --------
CASH FLOWS FROM OPERATING ACTIVITIES:
 Net earnings (loss)                                            $ 23,613       ($16,415)
  Noncash items:
     Deferred taxes                                               12,536             --
     Depreciation and amortization                                 2,896          2,131
     Amortization of (premium) discount on marketable               (284)           995
     securities
     Changes in inventory reserve                                 (1,918)        10,803
     Other                                                           232         (1,876)
  Other changes in assets and liabilities                        (12,160)       (16,073)
                                                                --------       --------
     Net cash provided by (used in) operating activities          24,915        (20,435)
                                                                --------       --------
  CASH FLOWS FROM INVESTING ACTIVITIES:
   Increase in marketable securities                             (52,737)       (58,581)
   Capital expenditures                                           (9,549)        (3,703)
   Investment in strategic alliance                               (6,350)            --
                                                                --------       --------
     Net cash used in investing activities                       (68,636)       (62,284)
                                                                --------       --------
  CASH FLOWS FROM FINANCING ACTIVITIES:
   Net proceeds from issuance of common stock
     and exercise of stock options                                21,325         76,135
   Decrease in long-term debt                                     (6,197)          (978)
                                                                --------       --------
     Net cash provided by financing activities                    15,128         75,157
                                                                --------       --------
  Net decrease in cash and cash equivalents                      (28,593)        (7,562)
  Cash and cash equivalents at beginning of period                37,959         29,984
                                                                --------       --------
  Cash and cash equivalents at end of period                    $  9,366       $ 22,422
                                                                ========       ========

  The accompanying notes are an integral part of these financial statements






                                 MEDIMMUNE, INC.
                          NOTES TO FINANCIAL STATEMENTS
                                   (UNAUDITED)


General

The  financial  information  presented  as of September  30,  1999,  and for the
periods ended  September 30, 1999 and 1998, is unaudited.  In the opinion of the
Company's management,  the financial information contains all adjustments (which
consist only of normal recurring  adjustments) necessary for a fair presentation
of such financial information.

Inventory
Inventory, net of reserves, is comprised of the following (in thousands):

                                      Sept. 30,    Dec. 31,
                                        1999        1998
                                      --------    --------
Raw Materials                         $  7,339    $  9,794
Work in Process                         10,268       9,188
Finished Goods                          11,066       5,727
                                      --------    --------
                                        28,673      24,709
Less noncurrent                         (6,227)     (4,949)
                                      --------    --------
                                      $ 22,446    $ 19,760
                                      ========    ========

As a result of the June 1998 FDA approval and the subsequent  market  acceptance
of Synagis, the Company reserved approximately $9.2 million against its RespiGam
inventory in the second quarter of 1998, as no further significant product sales
were  expected to result from this  inventory.  The reserve  balances  were $6.1
million  and $8.1  million as of  September  30,  1999 and  December  31,  1998,
respectively.

The Company also continues to purchase plasma and other raw materials for use in
production in the Company's Frederick,  Maryland manufacturing facility ("FMC"),
which is subject to FDA licensure and approval.  During the second quarter,  the
Company  submitted to the FDA an amendment to its Biologic  License  Application
requesting  authorization  to begin marketing  Synagis produced at the Frederick
facility.  Due to the  uncertainty  surrounding the likelihood and timing of FDA
approval,  all inventory for this facility has been classified as non-current in
the accompanying balance sheet.

Finished goods at September 30, 1999 and December 31, 1998 include approximately
$1.7 million and $1.6 million, respectively, of by-products that result from the
production  of  the  Company's   principal  products  at  one  of  its  contract
manufacturers and are held for resale.  As of September 30, 1999,  minimal sales
of these by-products have occurred. The September 30, 1999 and December 31, 1998
balances are net of a reserve of $1.7 million and $1.6 million, respectively.

Property and Equipment
Property  and  equipment,  stated at cost,  is comprised  of the  following  (in
thousands):

                                                    September 30,   December 31,
                                                         1999          1998
                                                       --------      --------
  Land                                                 $  2,147    $  2,147
  Buildings and building improvements                    12,489       7,085
  Leasehold improvements                                 13,738      12,736
  Laboratory, manufacturing and facilities equipment     12,427      10,841
  Office furniture, computers, and equipment              7,420       5,739
  Construction in progress                               48,042      48,067
                                                       --------    --------
                                                         96,263      86,615
  Less accumulated depreciation and amortization        (14,688)    (11,793)
                                                       --------    --------
                                                       $ 81,575    $ 74,822
                                                        ========    ========


Construction  in progress at September  30, 1999 and December 31, 1998  includes
$6.9 million and $5.3 million,  respectively, of capitalized interest related to
the  design  and  construction  of  the  Company's   manufacturing  facility  in
Frederick, Maryland. Construction of the manufacturing facility is substantially
complete and  validation  activities  are ongoing.  The Company will continue to
capitalize  costs related to the facility until placed in service.  The portions
of the facility that are subject to  inspection  and approval by the FDA will be
placed in service and  depreciation  will  commence if and when such approval is
received.

Earnings per Share

The  Company  computes  earnings  per  share in  accordance  with  Statement  of
Financial  Accounting  Standards  ("SFAS") No. 128,  "Earnings Per Share." Basic
earnings per share is computed  based on the weighted  average  number of common
shares  outstanding  during the period.  Diluted  earnings per share is computed
based on the weighted  average  shares  outstanding  and the dilutive  impact of
common stock equivalents  outstanding  during the period. The dilutive effect of
convertible  debt is measured  using the "if  converted"  method.  The  dilutive
effect of stock  options is measured  using the treasury  stock  method.  Common
stock  equivalents are not included in periods where there is a loss as they are
anti-dilutive.   The  following  is  a  reconciliation   of  the  numerator  and
denominator of the diluted EPS  computation  for the period ended  September 30,
1999.




                                                               

                                                 Three Months              Nine Months
                                           Ended Sept. 30, 1999      Ended Sept. 30, 1999
                                           --------------------      --------------------
Numerator:
Net earnings                                      $ 5,139                $23,613
Interest on 7% convertible notes, net of
amounts capitalized and related taxes                  --                    720
                                                  -------                -------
Numerator for diluted EPS                         $ 5,139                $24,333
                                                  =======                =======
Denominator:
Weighted average shares outstanding                62,890                 58,041
Effect of dilutive securities:
Stock options                                       4,009                  4,083
7% convertible notes                                  137                  4,089
                                                  -------                -------
Denominator for diluted EPS                        67,036                 66,213
                                                  =======                =======





No  reconciliation  of the numerator and  denominator is necessary for the three
months or nine months  ended  September  30,  1998,  as a loss was  reported and
inclusion of potential common shares would be anti-dilutive.

The following table shows the number of shares and related price ranges of those
shares that were excluded from the EPS computation from above.  These options to
purchase shares of common stock were  outstanding in the periods  reported,  but
were not  included  in the  computation  of  diluted  earnings  per share as the
exercise  prices of the options were in excess of the average stock price during
the periods reported, and thus would be anti-dilutive.


                                       Three Months           Nine Months Ended
                                   Ended Sept. 30, 1999    Ended Sept. 30, 1999
                                   --------------------    --------------------
Price range of stock options:
      $95.25 - $114.50                   196,200
      $70.75 - $114.50                                           705,800

Income Tax Provision

In the fourth quarter of 1998, the Company concluded that it is more likely than
not that it will  realize  a  portion  of the  benefit  of  previously  reserved
deferred tax assets.  Accordingly,  the Company reduced the valuation  allowance
against the asset and recorded a tax benefit of $59.8 million in December  1998.
Due to the  recognition  of the  Company's  tax benefit in 1998,  the  Company's
effective tax rate for 1999 is expected to approximate  the  applicable  federal
and state  statutory  rates.  The recognition of these deferred tax assets under
SFAS No. 109 has no impact on the Company's  cash flows for income taxes despite
the change in the Company's  effective tax rate. A provision for income taxes of
$12.9  million was  recorded  for the nine months  ended  September  30, 1999 as
compared to no provision  recorded for the nine months ended September 30, 1998.
The income tax provision for the nine-month period ending September 30, 1999 has
been computed  using an effective  combined  federal and state tax rate of 35.4%
and  includes a credit for the  estimated  tax benefit of the Orphan Drug credit
for qualified  expenses for the MEDI-507 GVHD program.  The tax benefit of stock
option exercise deductions has been recorded directly to shareholders' equity.

Proposed Merger

On  September  22,  1999,  the Company  and U.S.  Bioscience,  Inc.  announced a
definitive merger agreement  providing for the acquisition by the Company of all
the outstanding common stock of U.S.  Bioscience.  The merger is structured as a
tax-free,  stock-for-stock  transaction.  The Company intends to account for the
merger under the pooling-of-interests method. U.S. Bioscience,  headquartered in
West  Conshohocken,  Pennsylvania,  is a specialty  pharmaceutical  company that
develops and markets  products for patients with cancer and AIDS. In addition to
its West Conshohocken headquarters, U.S. Bioscience has a manufacturing facility
in Nijmegen, The Netherlands,  an analytical lab in Exton,  Pennsylvania,  and a
subsidiary near London to coordinate  clinical trials in Europe. U.S. Bioscience
presently  has three  products  on the  market.  Under  the terms of the  merger
agreement,  U.S. Bioscience shareholders will receive between 0.1364 and 0.1705,
subject to certain  adjustments,  of a share of MedImmune  common stock for each
share of U.S.  Bioscience  common stock owned.  The exact exchange ratio will be
determined  based on the trading range of MedImmune common stock over the 20-day
trading  period  ending  three  days  prior to the U.S.  Bioscience  shareholder
meeting,  set for  November  23,  1999,  to consider  the merger.  The merger is
subject to certain conditions.

Restatements

Prior year share and per share  amounts have been restated to give effect to the
two-for-one stock split on December 31, 1998.




ITEM 2.
                                 MEDIMMUNE, INC.
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS
THREE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998

Product  sales were $32.2  million in third quarter 1999 versus $22.2 million in
1998. Synagis sales increased 43% to $24.4 million for the third quarter of 1999
and  included  $2.3  million  of  international  sales  to  Abbott  Laboratories
("Abbott"), the Company's exclusive distributor of Synagis outside of the United
States.  The Company recognizes  international  Synagis sales to Abbott when the
vials are shipped to Abbott based on a contractual  transfer price. Upon sale by
Abbott to end users,  following  the end of each  quarter,  Abbott remits to the
Company a report detailing end user sales and the Company recognizes revenue for
the  additional  amount  due  in  excess  of the  transfer  price.  The  Company
anticipates  that 60% to 75% of the total revenue  expected to be recognized per
vial will be  recorded  upon  shipment of the vial to Abbott.  Synagis  sales in
third quarter 1998 were $17.0 million,  including  $0.3 million to Abbott.  Both
the  1999  and  1998  quarters   principally   reflect  wholesaler  stocking  in
preparation  for the RSV season.  CytoGam sales increased 32% to $7.1 million in
the third  quarter  of 1999  from $5.4  million  in the third  quarter  of 1998,
reflecting a 60% increase in total units sold,  partially  offset by an increase
in  government  rebate  allowances.  The  increase  in units sold  reflects  the
variability  in sales that may occur from the use of CytoGam as a substitute for
standard  intravenous  immune  globulin  ("IVIG")  products,  for which there is
currently a worldwide shortage.  RespiGam sales of $0.7 million in third quarter
1999 compared to no sales recorded in third quarter 1998.  The Company  believes
that a significant  portion of the RespiGam sales that occurred were as a result
of product substitution  occurring because of the worldwide shortage of standard
IVIG products.  The duration of this shortage and continued  impact,  if any, on
product sales cannot be  determined  at this time.  Future sales of RespiGam for
the RSV market are  expected  to be  minimal.  Other  revenues in the 1999 third
quarter of $16.7 million  included a $15 million  milestone  payment from Abbott
following  European  approval  of  Synagis in  August,  as well as funding  from
SmithKline Beecham ("SKB") for development of a human papillomavirus vaccine.
The 1998 quarter included research funding from SKB.

Cost of sales in third quarter 1999 increased to $10.8 million from $6.9 million
in third  quarter  1998,  an increase  of 57%.  Cost of sales in the 1999 period
reflects a 70%  increase  in unit sales over the 1998 period and a change in the
product mix  towards  Synagis  which has a lower per unit cost than  CytoGam and
RespiGam.  Gross margin of 69% in the 1998  quarter  compared to 66% in the 1999
quarter,  which was  negatively  impacted by the increase in CytoGam  government
rebate allowances.

Research,  development and clinical  spending  increased 77% to $10.2 million in
the third  quarter  of 1999  from $5.8  million  in the third  quarter  of 1998,
primarily  due to additional  Synagis  trials in infants with  congenital  heart
disease,  increased  research  funding,  increased  development  contracts and a
milestone  payment  to a third  party due upon  European  approval  of  Synagis.
Clinical  spending is expected to increase in the coming quarters as the Company
moves more of its  product  candidates  into the clinic  and  expands  trials on
products already in the clinic.

Selling,  administrative and general expenses increased to $18.3 million in this
year's  quarter  from $14.3  million in the 1998  quarter,  an  increase of 28%.
Expenses  in third  quarter  1999  include  $1.8  million  of  costs,  primarily
professional  fees,  associated with the proposed  merger with U.S.  Bioscience,
increased wage and related expenses as well as increased co-promotion expense to
the Ross Products Division of Abbott Laboratories for the continued promotion of
Synagis in the United States. Additional significant merger related expenses are
expected in the fourth quarter of 1999 following the completion of the merger.

Other operating  expenses of $4.4 million in the 1999 period decreased from $8.5
million in the 1998 period.  Charges in both periods  include  start-up costs at
the Company's  manufacturing  facility in Frederick,  Maryland.  Other operating
expenses in the 1998 period also  include  costs  related to scale-up of Synagis
production  at a  third-party  manufacturer  and at the  Company's  Gaithersburg
Manufacturing  and Development  Facility  ("GMDF").  Expenses in the 1998 period
also  included  a $1.5  million  milestone  payment  to a  third-party  contract
manufacturer.

Interest  income of $2.3 million was earned in the 1999 third quarter,  compared
to $1.6 million in the third  quarter of 1998,  reflecting  higher cash balances
available for investment, partially offset by a decrease in interest rates which
lowered the overall  portfolio yield.  Interest expense of $0.5 million and $1.0
million  was  incurred  in the 1999 and 1998  quarters,  respectively.  Interest
expense in the 1998 quarter  reflects  primarily  interest due on the  Company's
convertible  debt, net of  capitalized  interest.  Interest  expense in the 1999
quarter  includes  fees  associated  with the early  termination  of some of the
Company's equipment financing.

The Company  recorded a provision  for income  taxes of $1.8 million in the 1999
quarter to bring the year to date tax  provision to an effective  rate of 35.4%.
The tax  provision  for the 1999 quarter  includes a credit for the year to date
tax benefit for the Company's  MEDI-507 GVHD program,  for which the Company has
been given Orphan Drug status.  Orphan Drug status allows a company a direct tax
reduction of 50% for qualified  expenses.  No income tax benefit was recorded in
the 1998  period as the Company  incurred a loss and still had a full  valuation
allowance  against its deferred taxes.  In December 1998, the Company  concluded
that it was more  likely  than not it will  realize a portion of the  benefit of
previously deferred tax assets.  Accordingly,  the Company reduced the valuation
allowance against the asset and recorded a tax benefit of $59.8 million.  Due to
the recognition of the Company's tax benefit in 1998, the Company estimates that
its  effective  tax rate  will  approximate  the  applicable  federal  and state
statutory rate for 1999 and the near term thereafter.

Net  income in the 1999  third  quarter  was $5.1  million,  or $0.08  basic and
diluted net earnings per share.  Shares used in computing  basic and diluted net
earnings per share were 62.9  million and 67.0  million,  respectively.  The net
loss for the third quarter of 1998 was $11.1 million, or $0.21 basic and diluted
net loss per share. Shares used in computing the third quarter 1998 net loss per
share were 53.3 million.

Quarterly financial results may vary significantly due to seasonality of Synagis
product sales,  fluctuation in sales of CytoGam,  milestone  payments,  research
funding and  expenditures  for research,  development  and  marketing  programs.
Synagis sales are expected to occur primarily  during,  and in proximity to, the
RSV  season,  which  typically  occurs  between  October and April in the United
States.  No  assurances  can be  given  that  adequate  product  supply  will be
available to meet demand.  In addition,  no assurance  can be given that the FDA
will  approve  the  Company's  supplement  to its BLA for  marketing  of Synagis
produced at the FMC.

NINE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998

Product  sales  increased  129% to $167.4  million in the 1999 nine  months from
$73.2 million in the 1998 nine months.  Net sales of Synagis were $141.9 million
for the 1999 nine months,  which included $4.5 million of international sales to
Abbott.  Synagis sales in the 1998 nine months of $17.0 million,  including $0.3
million  of  international  sales to  Abbott,  occurred  entirely  in the  third
quarter,  following FDA approval in June 1998. CytoGam sales for the nine months
ended September 30, 1999 decreased 6% to $22.3 million from $23.8 million in the
nine months ended September 30, 1998. The decrease  primarily  reflects a change
in the sales mix to include a greater  percentage of  international  units which
have a lower selling  price,  and an increase in government  rebate  allowances,
partially  offset by an 11% increase in total units sold.  The increase in units
sold reflects the variability in the sales that may occur as a result of the use
of  CytoGam  as an IVIG  substitute.  RespiGam  sales  decreased  93% from $32.3
million in the nine  months of 1998 to $2.3  million in the nine months of 1999,
reflecting the shift in customer  demand from RespiGam to Synagis for prevention
of RSV disease. Other revenues in both the 1999 and 1998 periods include funding
from SKB for development of a human  papillomavirus  vaccine.  Other revenues in
1999 include a $15 million  milestone payment from Abbott upon European approval
of Synagis.  Other  revenues  in 1998  include a $15  million  payment  from SKB
following the signing of the agreement for development of a human papillomavirus
vaccine and a $15 million  milestone  payment  from Abbott upon FDA  approval of
Synagis.

Cost of sales for the 1999 nine months  increased 7% to $46.6 million from $43.7
million in the 1998 nine months.  Cost of sales in 1998  includes  approximately
$9.4 million  related to the  writedown  of RespiGam  inventory  and  by-product
inventory and a credit for previously  recorded  royalties expected to be due to
Massachusetts Health Research Institute. Excluding the effects of these one time
adjustments,  gross  margins  would have been 72% for the 1999 period versus 53%
for the 1998 period.  This  increase  primarily  reflects  favorable  margins on
Synagis,  which was not sold in the first half of 1998 and has lower  production
costs than CytoGam and RespiGam.

Research  and  development  expenses  of $27.8  million in the 1999 nine  months
increased 48% from $18.8 million in the 1998 nine months,  reflecting  increases
in the  infrastructure  needed to  support an  increased  quantity  of  clinical
projects as well as increased clinical trials spending, primarily for additional
Synagis trials. Selling,  general and administrative expenses were $65.2 million
and $30.4  million for the 1999 and 1998 periods,  respectively,  an increase of
114%.  Expenses in 1999 include  increases in  marketing  and selling  expenses,
sales force commissions, wage and related, and co-promotion expenses to the Ross
Products Division of Abbott  Laboratories for promotion of Synagis.  Expenses in
1999 also  include  $1.8  million of  professional  fees related to the proposed
merger with U.S. Bioscience.  Significant additional merger related expenses are
expected in the fourth quarter of 1999 following the closing of the transaction.
Expenses  in 1998  included  $0.9  million  due to AHP  under  the  terms of the
RespiGam co-promotion agreement.

Other operating expenses, which reflects manufacturing start-up costs, decreased
in the 1999  period to $16.3  million  from $33.4  million  in the 1998  period.
Expenses  in 1999  include a charge  of $1.4  million  to  reserve  for  certain
equipment  purchased for use in the FMC, as it was determined that the equipment
ultimately  will not be used in that facility.  Expenses in 1998 include a $10.3
million charge for the buy-down of certain Synagis royalty  obligations prior to
FDA approval,  as well as start-up costs for the Company's FMC and costs related
to scale-up of production of Synagis at a  third-party  manufacturer  and at the
Company's GMDF.

Income tax expense of $12.9  million  was  recorded  for the nine  months  ended
September  30,  1999,  at  an  overall  effective  tax  rate  of  35.4%,   which
approximates  the statutory rate. An income tax benefit was not recorded in 1998
due to the uncertainty of utilization of deferred tax assets at that time.

Interest  income of $7.0  million and $5.2  million was recorded in the 1999 and
1998 nine months,  respectively.  The  increase  reflects  higher cash  balances
available  for  investment,  partially  offset by lower  interest  rates,  which
decreased the overall portfolio yield.

Interest  expense of $2.3 million in the 1999 period  versus $3.1 million in the
1998 period reflects primarily  interest on the Company's  convertible debt, net
of capitalized  interest,  as well as interest on equipment financing.  Interest
expense in 1999 also includes fees associated with the early termination of some
of the Company's equipment financing.

Net income in the 1999 nine months was $23.6  million,  or $0.41 basic and $0.37
diluted earnings per share,  versus a net loss of $16.4 million,  or $0.31 basic
and diluted net loss per share for the nine months  ended  September  30,  1998.
Shares used in  computing  basic and diluted net earnings per share in 1999 were
58.0 million and 66.2 million, respectively.  Shares used in computing basic and
diluted net loss per share in 1998 were 52.8 million.

LIQUIDITY AND CAPITAL RESOURCES

Cash and  marketable  securities  at  September  30,  1999 were  $159.3  million
compared to $134.9  million at December 31, 1998. Net cash provided by operating
activities  in the nine  months  ended  September  30,  1999 was $24.9  million,
reflecting  net income for the period  and a  decrease  in  accounts  receivable
(reflecting  Synagis  seasonality),  offset by a decrease  in accrued  expenses,
primarily as a result of payments made to Abbott Laboratories in connection with
the Synagis co-promotion agreement. Capital expenditures of $9.5 million, net of
capitalized interest,  for the 1999 nine months were primarily for equipment and
facilities improvements at the Company's FMC. The Company receives cash from the
exercise of employee stock options.  During the nine months ended  September 30,
1999, stock option  exercises  provided $21.3 million of cash. In July 1999, $60
million of the Company's 7% convertible  subordinated  notes were converted into
common stock.  The transaction  resulted in the issuance of 6,097,545  shares of
common stock and increased  shareholders'  equity by $58.7 million, the carrying
amount of the  converted  debt on the date of the  conversion.  During  the 1999
third quarter, the Company retired $2.9 million of equipment financing.

The Company's existing funds at September 30, 1999, together with funds expected
to be  generated  from  product  sales and  investment  income,  are expected to
provide  sufficient  liquidity to meet the anticipated needs of the business for
the foreseeable future, absent the occurrence of any unforeseen events.

Year 2000 READINESS

The  Company  has   established   a  Year  2000   Project   Team   comprised  of
representatives  from key functional  areas to complete a review of its internal
and external systems for Year 2000 readiness. The Year 2000 issue is expected to
affect the systems of the Company  and various  entities  with which the Company
interacts,  including the Company's  marketing  partners,  suppliers and various
vendors.  The Year 2000 Project is designed to address  three major  areas:  (1)
information  technology systems,  (2) hardware,  equipment and  instrumentation,
including  embedded systems,  and (3) third party  relationships.  The Company's
plan involves  inventorying,  assessing and prioritizing  those items which have
Year  2000  implications;   remediating  (repairing,   replacing  or  upgrading)
non-compliant items; testing items with major exposure to ensure compliance; and
developing  contingency plans to minimize potential business  interruption.  All
phases of the project are substantially complete.

With regard to the Company's information technology systems, hardware, equipment
and   instrumentation,   the  Company  has  identified   mission   critical  and
non-critical items and is in the process of updating and/or replacing items that
are  non-compliant.  The Company has substantially  completed  implementation of
most of the  critical  aspects of its Year 2000 plan.  Because  the  Company has
relied primarily on off-the-shelf  software for its information technology needs
and because much of its  hardware,  equipment and  instrumentation  is currently
compliant,   the  Company  has  not  incurred  significant  costs  for  internal
remediation efforts. The Company does not separately track the internal costs of
its Year 2000 compliance  efforts and therefore  these costs are unknown.  As of
September  30,  1999,  the  Company  estimates  that it has  spent no more  than
$250,000 replacing, upgrading or repairing the systems and/or equipment that are
non-compliant  and  expects  the  remaining  costs to  complete  these  efforts,
including any contingency planning matters, should not exceed $300,000.

In addition to the risks  associated with the Company's own computer systems and
equipment,  the  Company  has  relationships  with,  and is in  varying  degrees
dependent upon, a large number of third parties that provide information,  goods
and services to the Company.  These include, but are not limited to, third party
manufacturers,   suppliers,   customers,  and  distributors.   The  Company  has
identified  and visited the  facilities  of third parties with which the Company
has material relationships to assess their Year 2000 readiness. Critical systems
and Year 2000 plans were  reviewed.  The  Company  may also be  affected  by the
failure of other third parties to be Year 2000  compliant even if they do not do
business directly with the Company.  For example,  the failure of state, federal
and private  payers or  reimbursers to be Year 2000 compliant and thus unable to
make timely,  proper or complete  payments to sellers and users of the Company's
products, could have a material adverse effect on the Company.

The Company has recently  prepared its Year 2000 contingency plan to address the
most likely worst case Year 2000  scenario.  The Company  believes that its most
likely  worst case  scenario  would be a break in the cold chain of its finished
goods  inventory  due to a power  failure  or failed  monitoring  equipment.  To
mitigate this risk, the Company plans,  among other things, to ensure that third
party warehouses have appropriate  contingency  plans in place to react promptly
to maintain the cold chain (for example,  by having generators on hand or trucks
on hand to move the inventory to another location).

With  regard  to  the  Company's  Year  2000  readiness  plan,  there  can be no
assurances:  1) that the  Company  will be able to  identify  all aspects of its
business  that are  subject  to Year  2000  problems,  including  issues  of its
customers or suppliers,  2) that the Company's  software vendors,  third parties
and others will be correct in their assertions that they are Year 2000 ready, 3)
that the  Company's  estimate  of the cost of Year  2000  readiness  will  prove
ultimately  to be  accurate,  4) that the Company  will be able to  successfully
address its Year 2000 issues and that this could result in interruptions  in, or
failures of, certain normal  business  activities or operations  that may have a
material  adverse  effect on the Company's  business,  results of operations and
financial condition.

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

THE STATEMENTS IN THIS QUARTERLY  REPORT THAT ARE NOT DESCRIPTIONS OF HISTORICAL
FACTS ARE  FORWARD-LOOKING  STATEMENTS.  SUCH  STATEMENTS  REFLECT  MANAGEMENT'S
CURRENT  VIEWS,  ARE BASED ON CERTAIN  ASSUMPTIONS  AND ARE SUBJECT TO RISKS AND
UNCERTAINTIES, INCLUDING BUT NOT LIMITED TO, regulatory approval timing, PRODUCT
DEMAND AND MARKET ACCEPTANCE RISKS, PATENT AND INTELLECTUAL PROPERTY RISKS, YEAR
2000 RISKS,  THE EARLY STAGE OF PRODUCT  DEVELOPMENT AND RELIANCE ON THIRD-PARTY
MANUFACTURERS  INCLUDING,  BUT NOT LIMITED TO, CAPACITY AND SUPPLY  CONSTRAINTS,
PRODUCTION  yields,  REGULATORY  APPROVAL TIMING AND FOREIGN  EXCHANGE RISKS, AS
WELL AS OTHER RISKS  DETAILED IN THE COMPANY'S  FILINGS WITH THE  SECURITIES AND
EXCHANGE  COMMISSION.  THE  FDA  IS  CURRENTLY  REVIEWING  A  SUPPLEMENT  TO THE
COMPANY'S  BIOLOGIC  LICENSE  APPLICATION TO ALLOW  PRODUCTION OF SYNAGIS AT THE
COMPANY'S  FREDERICK  MANUFACTURING  CENTER.  THERE CAN BE NO ASSURANCE THAT THE
COMPANY  WILL  RECEIVE  THE  REQUESTED  APPROVAL  THAT WOULD  ALLOW IT TO MARKET
PRODUCTS MADE AT THE FREDERICK  MANUFACTURING  CENTER. IN ADDITION,  THE FORWARD
LOOKING  STATEMENTS  INCLUDED  IN  THIS  REPORT  RELATE  TO  THE  COMPANY  AS  A
STAND-ALONE  BUSINESS,  AND DO NOT CONSIDER THE POTENTIAL IMPACT OF THE PROPOSED
MERGER WITH U.S.  BIOSCIENCE,  OR ANY  ASSOCIATED  RISK FACTORS.  ACTUAL RESULTS
COULD DIFFER  MATERIALLY  FROM THOSE  CURRENTLY  ANTICIPATED  AS A RESULT OF THE
FOREGOING OR OTHER FACTORS.




                                     PART II
                                OTHER INFORMATION


Item 1.     Legal Proceedings - None

Item 2.     Changes in Securities - None

Item 3.     Defaults upon Senior Securities - None

Item 4.     Submission of  Matters to a Vote of Security Holders - None

Item 5.     Other Information - None

Item 6.     Exhibits and reports on Form 8-K

            (a) Exhibits:

             10.99  Employment Agreement for Armando Anido

             11.00  Amendment to Lease  Agreement  for MOR  Bennington  LLLP and
                    MedImmune, Inc.

            (b) Reports on Form 8-K:

Report Date   Event Reported
- -----------   --------------
7/6/99        MedImmune and Pasteur Merieux Connaught Report Presentation of New
              Data on Lyme Disease Vaccine Candidate at International Lyme
              Meeting

7/12/99       MedImmune and Biotransplant Announce Results of MEDI-507 Trial in
              Severe Steroid-Resistant Graft-Versus-Host Disease Patients

7/21/99       MedImmune Report 1999 First Half Result

8/13/99       MedImmune Announces Novel Structure of Urinary Tract Infection
              Vaccine Target-X-ray Structure of FimC-FimH Complex Published in
              Science

9/2/99        Abbott Announces Approval of Breakthrough Prevention for RSV in
              Europe (Synagis Now Available in Europe)

9/15/99       MedImmune Licenses Catalytic Antibody to Treat Cocaine Overdose
              and Addition

9/22/99       MedImmune, Inc. to Acquire U.S. Biocience, Inc.








                                   SIGNATURES

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.



                                   MEDIMMUNE, INC.
                                   (Registrant)



                                   /s/David M. Mott
                                   ----------------
Date: November 15, 1999            David M. Mott
                                   Vice Chairman and Chief Financial Officer