Col. Cavan K. Craddock, 99th Air Base wing commander, receives his flu shot from Staff Sgt. Danielle Washington, 99th Medical Operations Squadron medical technician, Oct. 11, 2018 at a vaccination event held on Nellis Air Force Base, Nevada. The vaccination event was part of the 99th Medical Group’s 2018-2019 Influenza Campaign at Nellis. (U.S. Air Force photo by Airman Bailee A. Darbasie)