Homemade Cotton Masks Can Prevent 99.9% of COVID-19 Droplets

A new study from the University of Edinburgh's Roslin Institute in the UK finds that homemade cotton face masks can stop 99.9% of contagious droplets from spraying into the air when someone coughs or speaks, and surgical masks prevent 100% of droplets.Homemade Cotton Masks Can Prevent 99.9% of COVID-19 Droplets

In their study, the scientists checked the effect of surgical masks and homemade single-layer cotton masks. They found that a person standing 6ft away from someone without a mask was up to 1,000 times greater risk of inhaling droplets than 1.5ft away from someone with a mask.

Lead researcher Dr. Ignazio Maria Viola, a reader at the University of Edinburgh's School of Engineering, comments the results of the study: “We knew face masks of various materials are effective to a different extent in filtering small droplets. However, when we looked specifically at those larger droplets that are thought to be the most dangerous we discovered that even the simplest handmade single-layer cotton mask is tremendously effective.”


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