U.S. Air Force Staff Sgt. Kimberly Carranza (right), 31st Healthcare Operation Squadron family health technician, administers the second Moderna COVID-19 vaccine to Tech. Sgt. Raphael Baylis, 31st Maintenance Group quality assurance technician, at Aviano Air Base, Italy, Feb. 26, 2021. According to the 31st Medical Group, if an individual has received the first dose of the Moderna COVID-19 vaccine, the second should be administered 28-42 days later. (U.S. Air Force photo by Airman 1st Class Brooke Moeder)