December 3, 2020
From May: The first patient enrolled in Pfizer's COVID-19 coronavirus vaccine clinical trial at the University of Maryland School of Medicine in Baltimore. (Courtesy of University of Maryland School of Medicine via AP, File)
December 3, 2020
From May: The first patient enrolled in Pfizer's COVID-19 coronavirus vaccine clinical trial at the University of Maryland School of Medicine in Baltimore. (Courtesy of University of Maryland School of Medicine via AP, File)
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