FILE - This May 4, 2020, file photo provided by the University of Maryland School of Medicine, shows the first patient enrolled in Pfizer's COVID-19 coronavirus vaccine clinical trial at the University of Maryland School of Medicine in Baltimore. If big bad COVID-19 is ever to be knocked down, it just might take Diane Durand, a plucky grandmother from St. Simons Island to do it. (University of Maryland School of Medicine via AP, File)
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