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A medical worker takes a swab sample from a man for COVID-19 test during COVID-19 pandemic in Mexico City, Mexico, Aug. 1, 2020. (Photo by Sunny Quintero/Xinhua)
A medical worker takes a swab sample from a man for COVID-19 test during COVID-19 pandemic in Mexico City, Mexico, Aug. 1, 2020. (Photo by Sunny Quintero/Xinhua)