Homemade cotton masks can prevent 99.9% of coronavirus droplets from spraying into the air

A new study from the University of Edinburgh found that a homemade single-layer cotton mask reduced the number of infectious coronavirus droplets by more than 1,000 times. https://www.dailymail.co.uk/health/article-8671885/Homemade-cotton-masks-prevent-99-9-coronavirus-droplets-spraying-air.html?ns_mchannel=rss&ns_campaign=1490&ito=1490