U.S. Air Force Tech Sgt. Joseph Anthony, medical technician with the 911th Aeromedical Staging Squadron, administers a vaccination to a member of the U.S. Army Reserve’s 336 Engineering Company Command and Control, Chemical Radiological and Nuclear Response Enterprise Team at the Pittsburgh International Airport Air Reserve Station, Pennsylvania, April 11, 2019. Department of Defense issued vaccinations are used to prevent a variety of diseases that military members may encounter in the course of their duties. (U.S. Air Force photo by Joshua J. Seybert)