Syringe Preparation Air Force Capt. Michael Burnett, a physician assistant assigned to the 75th Operation Medical Readiness Squadron, Hill Air Force Base, prepares a syringe for a patient at Yuma Regional Medical Center in Yuma, Ariz., Feb. 24, 2022. SHARE IMAGE: Download Image: Full Size (0.75 MB) Tags: air force, coronavirus, covid19vaccine Photo By: Army Sgt. Froylan Grimaldo VIRIN: 220224-A-WB694-672.JPG Photo Gallery