Influenza vaccines are developed each year to protect people from the three strains expected to be most prevalent. All the viruses in the vaccine are killed, so it is not possible to get the flu from the vaccine.
Review Date: 1/1/2013 Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.