210108-N-NN369-1057 SAN DIEGO (Jan. 8, 2021) – Hospital Corpsman 2nd Class Don Williams receives a Pfizer COVID-19 vaccine at Naval Medical Center San Diego, January 8. The COVID-19 vaccination plan is phase driven and designed to protect members within the Department of Defense as quickly as possible. The vaccine was authorized for emergency use, and it is elective and not mandatory. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jessica Paulauskas)