How Long Did It Take to Develop the Flu Vaccine?
Jan 17, 2024
A flu vaccine syringe rests on a table at a flu vaccination clinic Oct. 14, 2020, in Lakewood, California. (Mario Tama/Getty Images) At a Glance The first flu vaccine was licensed for civilian use in the U.S. in 1945.Dr. Jonas Salk was one of the lead researchers.Nearly 200 million doses of vaccine were expected to be manufactured this flu season. The 1918 influenza pandemic infected an estimated 500 million people worldwide and left 675,000 people dead in the United States,...