Masks block 99.9% of large Covid-linked droplets: Study
Face masks reduce the risk of spreading large Covid-linked droplets when speaking or coughing by up to 99.9 percent, according to a lab experiment with mechanical mannequins and human subjects, researchers said Wednesday. A woman standing two metres (yards) from a coughing man without a mask will be exposed to 10,000 times more such droplets […]
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