Historically, vaccines were designed to protect against infection and transmission. However, this property does not extend to the recent respiratory viral vaccines.
While the annual influenza vaccines provide some protection against flu infections, their efficacy has left much to be desired. According to a 2023 research commentary co-authored by Dr. Anthony Fauci, former director of the National Institute of Allergy and Infectious Diseases, flu vaccines have been shown only to be 14 to 60 percent effective over the last 15 flu seasons.
