U.S. Air Force Captain Jeslyn Humphrey, 633d Healthcare Operations Squadron clinical nurse, gives Staff Sgt. Nicola Mari, 71st Fighting Generation Squadron tactical aircraft maintainer, a flu shot vaccination at Joint Base Langley-Eustis, Virginia. Nov. 6, 2024. Service members are required to receive vaccinations for the flu to maintain their healthy lifestyles and mission readiness. (U.S. Air Force photo by Airman Donnell Ramsey)