U.S. Air Force Staff Sgt. Bradley Debrick, 509th Medical Operations Squadron immunizations technician, fills a syringe at Whiteman Air Force Base, Missouri, Nov. 9, 2020. The flu vaccine is recommended by the Centers for Disease Control and Prevention for everyone 6 months and older to protect themselves and those who are immunocompromised by limiting the spread of the virus. (U.S. Air Force photo by Airman 1st Class Parker J. McCauley)