Sherri Chastain, 56th Medical Group medical laboratory technologist, tests fluid samples for the flu, the common cold, and COVID-19, July 13, 2022, at Luke Air Force Base, Arizona. The 56th MDG provides routine laboratory testing, drug testing and COVID-19 testing, to active-duty service members promoting health, wellness and ensuring military readiness. (U.S. Air Force photo by Airman Mason Hargrove)