A U.S. Marine poses for a portrait at the state-run, federally-supported Community Vaccination Center at the Pennsylvania Convention Center in Philadelphia, Pa., April 27. - A U.S. Marine poses for a portrait at the state-run, federally-supported Community Vaccination Center at the Pennsylvania Convention Center in Philadelphia, Pa., April 27.

A U.S. Marine poses for a photo in the 22 Area of Marine Corps Base Camp Pendleton, California, March 25. - A U.S. Marine poses for a photo in the 22 Area of Marine Corps Base Camp Pendleton, California, March 25.

U.S. Marine Brig. Gen. Doug Pierson, Commanding General, 4th Marine Logistics Group, receives the second shot of the Pfizer-BioNTech COVID-19 vaccine at Fort Lewis, WA. on Jan. 15, 2020. - U.S. Marine Brig. Gen. Doug Pierson, Commanding General, 4th Marine Logistics Group, receives the second shot of the Pfizer-BioNTech COVID-19 vaccine at Fort Lewis, WA. on Jan. 15, 2020.

A U.S. Marine gets her arm disinfected to receive her second dose of the COVID-19 vaccine at the U.S. Naval Hospital Okinawa, on Camp Foster, Mar. 2. - A U.S. Marine gets her arm disinfected to receive her second dose of the COVID-19 vaccine at the U.S. Naval Hospital Okinawa, on Camp Foster, Mar. 2.

U.S. Navy sailor prepares a Marine for their first dose of the Moderna COVID-19 vaccine, Gotemba, Japan, Feb. 18. - U.S. Navy sailor prepares a Marine for their first dose of the Moderna COVID-19 vaccine, Gotemba, Japan, Feb. 18.

A U.S. Navy corpsman administers a U.S. Marine with the Pfizer-BioNTech COVID-19 Vaccine on Camp Lejeune, N.C., Jan. 15. - A U.S. Navy corpsman administers a U.S. Marine with the Pfizer-BioNTech COVID-19 Vaccine on Camp Lejeune, N.C., Jan. 15.

A Navy seaman wearing personal protective equipment stands on the driver's side of a vehicle and talks to a service member who is sitting in his vehicle. - Navy Seaman Christian Monieno, assigned to the Naval Medical Center Camp Lejeune, N.C., prepares to conduct a COVID-19 screening on Marine Corps Cpl. Menelik Collins, a combat photographer assigned to the Communication Strategy and Operations Company, II Marine Expeditionary Force Information Group, at the new Combined Respiratory Aid Station, Jan. 8, 2021.

U.S. Marine Corps and Navy medical personnel and first responders complete an initial screening to receive the Moderna COVID-19 vaccine at the U.S. Naval Hospital Okinawa on Camp Foster, Okinawa, Japan, Dec. 29, 2020. The Department of Defense’s (DOD) COVID-19 vaccination plan is phase driven and designed to protect members within the DOD fromCOVID-19 as quickly and safely as possible in order to bolster mission readiness and enhance capabilities of DOD members worldwide. (U.S. Marine Corps photo by Lance Cpl. Alex Fairchild) - U.S. Marine Corps and Navy medical personnel and first responders complete an initial screening to receive the Moderna COVID-19 vaccine at the U.S. Naval Hospital Okinawa on Camp Foster, Okinawa, Japan, Dec. 29, 2020. The Department of Defense’s (DOD) COVID-19 vaccination plan is phase driven and designed to protect members within the DOD fromCOVID-19 as quickly and safely as possible in order to bolster mission readiness and enhance capabilities of DOD members worldwide. (U.S. Marine Corps photo by Lance Cpl. Alex Fairchild)