CHINHAE, Republic of Korea (Feb. 4, 2021) Hospital Corpsman 2nd Class Shannon Riffe explains the screening process to Republic of Korea navy Lt. Cmdr. Jaeho Lee, Republic of Korea Fleet Medical Planner, and Lt. Cmdr. Jihwa Kim, Republic of Korea Naval Health Clinic Busan officer in charge. Sailors from Branch Health Clinic Chinhae and Soldiers from the 549th Hospital Center, 65th Medical Brigade, administered the second dose of COVID-19 vaccines, on a completely voluntary basis, to personnel identified by DoD distribution guidance. (U.S. Navy photo by Mass Communication Specialist Seaman Adam Craft)