U.S. Air Force Airman 1st Class Julia Maldonado, 633rd Medical Support Squadron Laboratory medical laboratory technician, tests a blood sample at Joint Base Langley-Eustis, Va., June 26, 2017. In order to ensure the most accurate results possible, it is important to follow the physician’s instructions, prior to submitting samples. (U.S. Air Force photo/Staff Sgt. Teresa J. Cleveland)