SAN DIEGO (Jan. 12, 2021) Hospitalman Giuseppe Campagna, from Bakersfield, Calif., administers a COVID-19 vaccination injection as part of a shot exercise taking place on Naval Base San Diego. The COVID-19 vaccination plan is phase driven and designed to protect members within the Department of Defense as quickly as possible and maintain mission readiness. (U.S. Navy photo by Mass Communication Specialist 2nd Class Austin Haist)