A microscope is used to observe a blood sample July 8, 2019, at McConnell Air Force Base, Kan. McConnell Laboratory’s hemoglobin station is used to examine iron levels, red and white blood cell counts and other information that can provide insights about Airmen’s health. ( Air Force photo by Senior Airman Alan Ricker)

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Photo credit: © APFootage / Alamy / Afripics
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Keywords: 22, arw