Air Force Capt. Michael Grady, 60th Medical Group Hematology and Oncology nurse manager, administers the second dose of the COVID-19 vaccine Jan. 28, 2021, to Master Sgt. Jeremy Rigg, 79th Air Refueling Squadron boom operator, at the fitness center at Travis Air Force Base, California. The vaccine requires two doses per person, separated by about four weeks between doses. It is designed to protect personnel against the coronavirus, and medical personnel are encouraging all personnel to take the vaccine as it becomes available.

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