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U.S. Air Force Tech. Sgt. Steve Zavala, 422nd Medical Squadron medical operations flight chief and trusted care champion, demonstrates COVID-19 testing procedures at RAF Croughton, England, August 3, 2020. Zavala discovered a COVID-19 testing technique that needed to be changed, so he elevated the concern and impacted testing procedures across the Department of Defense. (U.S. Air Force photo by Airman 1st Class Jennifer Zima).

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U.S. Air Force Tech. Sgt. Steve Zavala, 422nd Medical Squadron medical operations flight chief and trusted care champion, demonstrates COVID-19 testing procedures at RAF Croughton, England, August 3, 2020. Zavala discovered a COVID-19 testing technique that needed to be changed, so he elevated the concern and impacted testing procedures across the Department of Defense. (U.S. Air Force photo by Airman 1st Class Jennifer Zima).

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