Face Masks’ Ability to Stop Viruses Needs Study, Review Finds
A pedestrian wearing a protective face mask walks past an HSBC Holdings Plc bank branch in Hong Kong, China, on Thursday, Dec. 8, 2022.
Photographer: Paul Yeung/BloombergGreetings from Michelle in Hong Kong, where I still have to wear a mask almost all day, every day, when I’m in a public place. But before I get to that…
More than three years after Covid-19 emerged, and despite influenza outbreaks that kill thousands of people annually, there’s still not definitive proof on how much — or whether — wearing masks slows the transmission of respiratory viruses.