CAMP LEMONNIER, Djibouti (Feb. 25, 2021) U.S. Navy Lt. David Cruz, the preventive medicine department head with the Expeditionary Medical Facility (EMF), places the COVID-19 vaccine in a storage freezer at Camp Lemonnier, Djibouti, Feb. 25, 2021. The vaccine must be stored at minus 25 C to minus 15 C to be maintained. (U.S. Air Force photo by Senior Airman Taylor Davis)