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.
Review Date 8/23/2019
Updated by: Reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.