state North Carolina Coronavirus cover testing virus infection and state North Carolina

Scientists test 14 face masks - and find one actually increases risk of infection

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www.dailystar.co.uk

coronavirus, anything is better than nothing. But new research from Duke University in North Carolina reveals that not only are some face covering much more efficient than others, but some actually make transmission of the virus more likely.The most effective face-covering the researchers tested was a fitted N95 mask without valves which allowed just 0.1%.

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