In some states and major cities, it’s now mandatory to wear a mask in public to prevent the spread of COVID-19. That mask could be anything from a handkerchief to a designer cotton mask to a full-blown N95 respirator, so long as you have something between your mouth and nose and the world around you. But in California’s Bay Area, there’s a new stipulation: You can wear any style of mask you want, so long as it doesn’t have a valve in it. What? Why? Because a mask with a valve may protect you from some pathogens in the air, but it doesn’t protect the people around you from your own breath.
Read more of this story at Slashdot.
Source:
https://science.slashdot.org/story/20/05/08/204255/why-you-shouldnt-wear-a-covid-19-mask-that-has-a-valve?utm_source=rss1.0mainlinkanon&utm_medium=feed