U.S. Air Force Maj. Richard Gray, left, 501st Combat Support Wing chief of medical staff, informs 423rd Security Forces Squadron Airmen about the COVID-19 vaccine prior to its administration at Royal Air Force Alconbury, England, Jan. 5, 2021. 501st CSW first responders were prioritized to receive the vaccine based on the guidance from the Centers for Disease Control and Prevention as well as the DoD COVID Task Force’s assessment of unique DoD mission requirements. (U.S. Air Force photo by Senior Airman Jennifer Zima)