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Here are the five most effective face mask styles according to science

Bad news for people wearing bandannas and fleeces and even worse news for those around them.

Woman wearing an anti virus protection mask to prevent others from corona COVID-19 and SARS cov 2 in...
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Researchers at Duke University are using a novel method to judge the effectiveness of different styles of face mask.

Using a setup consisting of a box, a laser, a lens, and a cell phone camera, chemist and physicist Martin Fischer was able to devise a system for counting the number of particles expelled from each type of mask as they repeated the phrase, "Stay healthy, people."