A graduate student at the Penn Center for Research on Coronavirus and Other Emerging Pathogens, demonstrates a viral RNA extraction at the University of Pennsylvania’s Perelman School of Medicine, in Philadelphia, Pennsylvania, on December 16, 2021
A graduate student at the Penn Center for Research on Coronavirus and Other Emerging Pathogens, demonstrates a viral RNA extraction, at the University of Pennsylvania's Perelman School of Medicine, in Philadelphia, Pennsylvania, on December 16, 2021. REUTERS/Hannah Beier