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                                                  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
                                                           January 15, 2002


                                                      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



<PAGE>


ITEM 5.  OTHER EVENTS

The Company issued the following press release on January 15, 2002.

                                                MedImmune Completes Aviron Acquisition

Gaithersburg, MD, January 15, 2002 -- MedImmune, Inc. (Nasdaq: MEDI) announced today that it has completed its acquisition of
Aviron. MedImmune acquired over 90 percent of the Aviron shares in an exchange offer which closed January 9, 2002. Earlier today, a
MedImmune subsidiary merged into Aviron, as a result of which Aviron has become a wholly-owned subsidiary of MedImmune. In the
merger, each remaining Aviron share was converted into the right to receive 1.075 MedImmune shares, the same exchange ratio as in
the offer.

Aviron is a biopharmaceutical company headquartered in Mountain View, California, focused on prevention of disease through
innovative vaccine technologies. The company's product portfolio includes: FluMist&#153;, a live virus vaccine delivered as a nasal
mist for the prevention of influenza; a live parainfluenza virus type 3 vaccine; a vaccine to prevent Epstein-Barr virus, and a
cytomegalovirus vaccine. For more information on Aviron, visit the company's website at www.aviron.com.

MedImmune, Inc. is a fully integrated biotechnology company focused on developing and marketing products that address medical needs
in areas such as infectious disease, immune regulation and cancer. Headquartered in Gaithersburg, Maryland, MedImmune has
manufacturing facilities in Frederick, Maryland and Nijmegen, the Netherlands. MedImmune markets five products, including:
Synagis&reg; (palivizumab), which is marketed for the prevention of serious lower respiratory tract disease caused by respiratory
syncytial virus in pediatric patients at high risk of RSV disease, which is prominent in the Northern Hemisphere from October
through May (see full prescribing information at www.medimmune.com); Ethyol&reg;, which is marketed for the reduction of both
cumulative renal toxicity associated with repeated administration of cisplatin in patients with advanced ovarian cancer or non-small
cell lung cancer and moderate to severe xerostomia in patients undergoing post-operative radiation treatment for head and neck
cancer, where the radiation port includes a substantial portion of the parotid (see full prescribing information at
www.medimmune.com); and CytoGam&reg;, which is marketed for the prophylaxis against cytomegalovirus disease associated with
transplantation of kidney, lung, liver, pancreas, and heart (see full prescribing information at www.medimmune.com). MedImmune also
has six products in various stages of clinical testing for a number of diseases and several more product candidates in preclinical
testing. For more information on MedImmune, visit the company's website at www.medimmune.com.

This announcement may contain, in addition to historical information, certain forward-looking statements that involve risks and
uncertainties. Such statements reflect management's current views and are based on certain assumptions. Actual results could differ
materially from those currently anticipated as a result of a number of factors, including risks and uncertainties discussed in
MedImmune's and Aviron's filings with the SEC. MedImmune and Aviron are developing products for potential future marketing. There
can be no assurance that such development efforts will succeed, that such products will receive required regulatory clearance or
that, even if such regulatory clearance were received, such products would ultimately achieve commercial success. There can be no
assurance that Aviron will be integrated successfully or without unanticipated costs.

Aviron stockholders and other investors are urged to read the registration statement on Form S-4, Schedule TO, final prospectus and
other exchange offer documents which have been filed or will be filed by MedImmune with the Securities and Exchange Commission and
the related solicitation/recommendation statement filed by Aviron with the SEC. These documents contain important information about
MedImmune, Aviron and the transaction. Documents filed with the SEC are available for free at the SEC's website at www.sec.gov.
Documents are also available for free from MacKenzie Partners, Inc., 800-322-2885.


                                                              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/: Gregory S. Patrick
Date: January 15, 2002                                        Gregory S. Patrick
                                                              Senior Vice President and Chief Financial Officer

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Form 8-K
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
                                                           January 15, 2002

                                                      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
ITEM 5.  OTHER EVENTS

The Company issued the following press release on January 15, 2002.

                                                MedImmune Completes Aviron Acquisition

Gaithersburg, MD, January 15, 2002 -- MedImmune, Inc. (Nasdaq: MEDI) announced today that it has completed its acquisition of
Aviron. MedImmune acquired over 90 percent of the Aviron shares in an exchange offer which closed January 9, 2002. Earlier today, a
MedImmune subsidiary merged into Aviron, as a result of which Aviron has become a wholly-owned subsidiary of MedImmune. In the
merger, each remaining Aviron share was converted into the right to receive 1.075 MedImmune shares, the same exchange ratio as in
the offer.

Aviron is a biopharmaceutical company headquartered in Mountain View, California, focused on prevention of disease through
innovative vaccine technologies. The company's product portfolio includes: FluMist™, a live virus vaccine delivered as a nasal
mist for the prevention of influenza; a live parainfluenza virus type 3 vaccine; a vaccine to prevent Epstein-Barr virus, and a
cytomegalovirus vaccine. For more information on Aviron, visit the company's website at www.aviron.com.

MedImmune, Inc. is a fully integrated biotechnology company focused on developing and marketing products that address medical needs
in areas such as infectious disease, immune regulation and cancer. Headquartered in Gaithersburg, Maryland, MedImmune has
manufacturing facilities in Frederick, Maryland and Nijmegen, the Netherlands. MedImmune markets five products, including:
Synagis® (palivizumab), which is marketed for the prevention of serious lower respiratory tract disease caused by respiratory
syncytial virus in pediatric patients at high risk of RSV disease, which is prominent in the Northern Hemisphere from October
through May (see full prescribing information at www.medimmune.com); Ethyol®, which is marketed for the reduction of both
cumulative renal toxicity associated with repeated administration of cisplatin in patients with advanced ovarian cancer or non-small
cell lung cancer and moderate to severe xerostomia in patients undergoing post-operative radiation treatment for head and neck
cancer, where the radiation port includes a substantial portion of the parotid (see full prescribing information at
www.medimmune.com); and CytoGam®, which is marketed for the prophylaxis against cytomegalovirus disease associated with
transplantation of kidney, lung, liver, pancreas, and heart (see full prescribing information at www.medimmune.com). MedImmune also
has six products in various stages of clinical testing for a number of diseases and several more product candidates in preclinical
testing. For more information on MedImmune, visit the company's website at www.medimmune.com.

This announcement may contain, in addition to historical information, certain forward-looking statements that involve risks and
uncertainties. Such statements reflect management's current views and are based on certain assumptions. Actual results could differ
materially from those currently anticipated as a result of a number of factors, including risks and uncertainties discussed in
MedImmune's and Aviron's filings with the SEC. MedImmune and Aviron are developing products for potential future marketing. There
can be no assurance that such development efforts will succeed, that such products will receive required regulatory clearance or
that, even if such regulatory clearance were received, such products would ultimately achieve commercial success. There can be no
assurance that Aviron will be integrated successfully or without unanticipated costs.

Aviron stockholders and other investors are urged to read the registration statement on Form S-4, Schedule TO, final prospectus and
other exchange offer documents which have been filed or will be filed by MedImmune with the Securities and Exchange Commission and
the related solicitation/recommendation statement filed by Aviron with the SEC. These documents contain important information about
MedImmune, Aviron and the transaction. Documents filed with the SEC are available for free at the SEC's website at www.sec.gov.
Documents are also available for free from MacKenzie Partners, Inc., 800-322-2885.

                                                              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/: Gregory S. Patrick
Date: January 15, 2002                                        Gregory S. Patrick
                                                              Senior Vice President and Chief Financial Officer