Tech. Sgt. Nadezhda Ayala, 59th Medical Diagnostics and Therapeutics Squadron medical laboratory technician, prepares saline solutions to test for antibiotic sensitivities at Wilford Hall Ambulatory Surgical Center, Joint Base San Antonio-Lackland, Texas, August 12, 2021. The WHASC’s clinical laboratory gives providers results of which antibiotics work best for each patient.

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Keywords: cbc, control, covid19, microbiology, quality, tests