It’s all in the blood
U.S. Air Force Senior Airman Brittani Payton, 20th Medical Support Squadron medical laboratory technician, performs an Erythrocyte Sedimentation Rate (ESR) test on a control sample at Shaw Air Force Base, S.C., Dec. 20, 2016. An ESR tests blood for non-specific inflammation in patients; if the test returns abnormal results, it allows doctors to determine further treatment. (U.S. Air Force photo by Airman 1st Class Kelsey Tucker)