Masks are effective. They limit the spread of Covid-19. That's the result of the largest study of masks ever involving nearly 350,000 people across 600 rural villages in Bangladesh. Researchers from Universities of Stanford and Yale found a 30-percent increase in mask-wearing led to a 10 percent drop in infections. Scientists believe, we can't mask our way out of the pandemic but it is one important layer of protection besides physical distancing, testing and getting vaccinated. While they've also been the subject of politcal controversy - the simple act of covering your mouth and nose has been, and remains, an essential tool to limit the spread of the coronavirus.
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