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U.S. Department of Health and Human Services

Vaccines, Blood & Biologics

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Influenza Virus Vaccine Composition and Lot Release

Each year, the FDA, World Health Organization, the Centers for Disease Control and Prevention and other public health experts collaborate on the review of influenza disease surveillance and laboratory data collected from around the world in an effort to identify strains that may cause the most illness in the upcoming season. Based on that information and on the recommendations of the FDAs Vaccines and Related Biological Products Advisory Committee, the FDA selects the different influenza strains each year that manufacturers should include in their vaccines for the U.S. population for the upcoming influenza season. The closer the match between the circulating strains causing disease and the strains in the vaccine, the better the protection against influenza.

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Contact FDA

(800) 835-4709
(301) 827-1800
Consumer Affairs Branch (CBER)

Division of Communication and Consumer Affairs

Office of Communication, Outreach and Development

Food and Drug Administration

1401 Rockville Pike

Suite 200N/HFM-47

Rockville, MD 20852-1448
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