CHINHAE, Republic of Korea (Jan. 19, 2021) U.S. Army Sgt. Adrian Yelder fills a syringe with a dose of a COVID-19 vaccine at Navy Branch Health Clinic Chinhae. Sailors from Branch Health Clinic Chinhae and Soldiers from the 549th Hospital Center, 65th Medical Brigade, administered COVID-19 vaccines, on a completely voluntary basis, to personnel identified by Department of Defense distribution guidance. (U.S. Navy photo by Mass Communication Specialist 2nd Class Michael Chen)