Senior Airman Catherine Settles, 633rd Medical Group aerospace medical technician, wipes allergens from a baby’s back after a skin prick test, Feb. 21, 2013, at U.S. Air Force Hospital Langley, Va. For this child, Settles tested common food allergies like peanuts, soy and egg. (U.S. Air Force photo by Airman 1st Class Austin Harvill/Released)