Influenza vaccines are developed each year to protect people from the strains expected to be most prevalent. Viruses in the vaccine are inactivated or attenuated, so it is not possible to get the flu from the vaccine.
Reviewed By:
Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.