News Pressroom

September 2, 2003

FluMist(TM), First Intranasal Flu Vaccine in the U.S., Now Available From Health Care Providers

GAITHERSBURG, Md., and MADISON, N.J., Sept. 2 /PRNewswire-FirstCall/ -- MedImmune Vaccines, Inc., and Wyeth Vaccines announced today that FluMist(TM) (Influenza Virus Vaccine Live, Intranasal), the first influenza vaccine delivered as a nasal mist approved in the United States for healthy people, is now available in doctors' offices and in some pharmacies nationwide for the 2003-2004 influenza season. FluMist(TM) is indicated for active immunization for the prevention of disease caused by influenza A and B viruses in healthy children and adolescents, 5 to 17 years of age, and healthy adults, 18 to 49 years of age.

(Photo: http://www.newscom.com/cgi-bin/prnh/20030902/DCTU010 )

"FluMist(TM) is the first needle-free option in the U.S. for immunizing healthy children and adults against influenza," said Robert B. Belshe, M.D., Professor of Internal Medicine, Pediatrics, Molecular Microbiology and Immunology at Saint Louis University, and the lead investigator of key FluMist(TM) clinical trials. "Healthy people should consider vaccination against the flu, as the burden of influenza in this population is significant. With the availability of FluMist(TM), more healthy people could get vaccinated against influenza this fall."

The flu is a recurrent epidemic infectious disease that significantly affects and disrupts the lives of healthy children and adults. Each year in the U.S., an estimated 17 million to 50 million people, many of whom are otherwise healthy children and adults, are infected with the influenza virus. Influenza also results in approximately $3 billion to $15 billion annually in direct and indirect costs, including approximately 70 million missed workdays and approximately 38 million missed school days.

Because the influenza virus is airborne, it is easily transmitted, placing nearly everyone at risk for exposure. Areas where people gather, such as schools, homes, and offices, are likely locations for catching the flu. The most effective way to prevent influenza is vaccination.

Many health care professionals immunize against the flu between October and November, although vaccination can be beneficial even beyond December. Flu season peaks between December and March; however, many health care professionals vaccinate as soon as vaccine is available.

For more information about FluMist(TM) and where it is available, visit www.FluMist.com or call 1-877-FluMist.

About FluMist(TM)

FluMist(TM) is indicated for active immunization for the prevention of disease caused by influenza A and B viruses in healthy children and adolescents, 5 to 17 years of age, and healthy adults, 18 to 49 years of age.

In placebo-controlled clinical trials, the most common solicited adverse events in healthy children (n=214) included runny nose/nasal congestion, cough, irritability, headache, decreased activity, sore throat, fever (oral temperature > 100 degrees F), muscle aches, chills, and vomiting. The most common adverse events in healthy adults (n=2,548) included runny nose, headache, sore throat, tiredness/weakness, muscle aches, cough, and chills.

There are risks associated with all vaccines, including FluMist(TM). FluMist(TM) does not protect 100% of individuals vaccinated, or protect against viral strains not represented in the vaccine. FluMist(TM) is not indicated for immunization of individuals less than 5 years of age, or 50 years of age and older. FluMist(TM) is contraindicated in persons with hypersensitivity to any component of the vaccine, including eggs; in children and adolescents receiving aspirin therapy or aspirin-containing therapy; in individuals with a history of Guillain-Barre syndrome; and in individuals with known or suspected immune deficiency. The safety and efficacy of FluMist(TM) have not been established in pregnant women or for patients with chronic underlying medical conditions, including asthma or reactive airways disease; the vaccine should not be administered to these patients. See Prescribing Information for indications and usage, dosage and administration, and safety information.

About MedImmune, Inc., and Wyeth

MedImmune Vaccines, Inc., is a wholly owned subsidiary of MedImmune, Inc. (Nasdaq: MEDI). MedImmune, Inc., is a leading biotechnology company focused on researching, developing, and commercializing products to prevent or treat infectious disease, autoimmune disease, and cancer. MedImmune actively markets four products, Synagis(R) (palivizumab), FluMist(TM) (Influenza Virus Vaccine Live, Intranasal), Ethyol(R) (amifostine), and CytoGam(R) (cytomegalovirus immune globulin intravenous (human)), and has additional products in clinical testing. MedImmune employs approximately 1,700 people, is headquartered in Gaithersburg, Maryland, and has additional operations in Frederick, Maryland, as well as Pennsylvania, California, the United Kingdom, and the Netherlands. For more information on MedImmune, visit the company's Web site at www.medimmune.com.

Wyeth Vaccines is a business unit of Wyeth Pharmaceuticals, a division of Wyeth (NYSE: WYE). Wyeth Pharmaceuticals has leading products in the areas of women's health care, cardiovascular disease, central nervous system, inflammation, hemophilia, oncology, and vaccines. Wyeth is one of the world's largest research-driven pharmaceutical and health care products companies. It is a leader in the discovery, development, manufacturing, and marketing of pharmaceuticals, vaccines, biotechnology products, and non-prescription medicines that improve the quality of life for people worldwide. The Company's major divisions include Wyeth Pharmaceuticals, Wyeth Consumer Healthcare and Fort Dodge Animal Health.

The statements in this press release that are not historical facts are forward-looking statements based on current expectations of future events that involve risks and uncertainties including, without limitation, risks associated with the inherent uncertainty of pharmaceutical research, product development, manufacturing and commercialization, economic conditions, including interest and currency exchange rate fluctuations, the impact of competitive or generic products, product liability and other types of lawsuits, the impact of legislative and regulatory compliance and obtaining approvals, and patent, and other risks and uncertainties, including those detailed from time to time in Wyeth's and MedImmune's periodic reports, including quarterly reports on Form 10-Q and annual reports on Form 10-K, filed with the Securities and Exchange Commission. Actual results may vary materially from the forward-looking statements. The Companies assume no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

SOURCE  MedImmune, Inc.; Wyeth Vaccines
    -0-                             09/02/2003
    /CONTACT:  Media: Jamie Lacey of MedImmune, Inc., +1-240-632-4035; or
Douglas Petkus of Wyeth Pharmaceuticals, +1-484-865-5140; or Investors: Will
Roberts of MedImmune, Inc., +1-301-527-4358; or Justin Victoria of Wyeth,
+1-973-660-5340/
    /Photo:  NewsCom:  http://www.newscom.com/cgi-bin/prnh/20030902/DCTU010
              AP Archive:  http://photoarchive.ap.org
              PRN Photo Desk, photodesk@prnewswire.com/
    /Web site:  http://www.medimmune.com
                http://www.FluMist.com/
    (MEDI WYE)

CO:  MedImmune, Inc.; Wyeth Vaccines; MedImmune Vaccines, Inc.; Wyeth
     Pharmaceuticals; Wyeth
ST:  Maryland, New Jersey
IN:  MTC HEA
SU:  PDT


MB-JA 
-- DCTU010 --
3546 09/02/2003 09:23 EDT http://www.prnewswire.com