COVID-19 Vaccine Air Force Staff Sgt. Matthew Basa, 19th Medical Group aerospace medical technician, administers the Moderna COVID-19 vaccine at Little Rock Air Force Base, Ark., Jan 14, 2021. The Moderna COVID-19 vaccine is given in two doses and is 94.1% effective, according to the Centers for Disease Control and Prevention. SHARE: Download: Full Size (2.67 MB) Tags: Air Force, coronavirus, warp speed, ows, covid19vaccine Credit: Air Force Senior Airman Aaron Irvin VIRIN: 210114-F-ZA639-1083A.JPG Photo Gallery