GROTON, Conn. (Feb. 24, 2021) Navy Medicine Readiness and Training Unit Groton health care professionals administer COVID-19 vaccines in Morton Hall Gymnasium at Naval Submarine Base (SUBASE) New London. The gym was used as a base mass-distribution site. Vaccinations are crucial to the prevention of disease and the preservation of health and readiness, and the current COVID-19 vaccines used by the Navy have shown to provide an average of 95% efficacy in preventing symptomatic infections. (U.S. Navy photo by Mass Communication Specialist 2nd Class Tristan B. Lotz)