CAMP LEMONNIER, Djibouti (Feb. 27, 2021) Hospital Corpsman 2nd Class Quentin Denzel Foley, a preventive medicine technician with the Expeditionary Medical Facility (EMF), prepares the COVID-19 vaccine for use at Camp Lemonnier, Djibouti, Feb. 27, 2021. The vaccine was kept at a frozen state at minus 25 C to minus 15 C and thawed the day of use in order to maintain its viability. (U.S. Air Force photo by Senior Airman Taylor Davis)