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Staff Sgt. John, laboratory medical technician, prepares a complete blood count sample for the Coulter AcT diff2 CBC machine at an undisclosed location in Southwest Asia Jan. 21, 2015. The Coulter AcT diff2 offers a full range of features to include measuring red blood cells, which carry oxygen to white blood cells, which fight infection. John is currently deployed from Moody Air Force Base, Ga., and is a native of Christiansburg, Va. (U.S. Air Force photo/Tech. Sgt. Marie Brown)
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