Paul Edelstein of the Perelman School of Medicine spoke about the effectiveness of face masks in preventing the spread of COVID-19. "There are people without symptoms going about their daily business who are unknowingly breathing out droplets that are carrying the virus," he said. "If they had their faces covered the majority of those droplets would be caught before they can infect other people. Wearing face coverings can help save lives and prevent disabling illnesses."

July 7, 2020 ・ From BBC News