Coronavirus: two masks are better than one, US researchers say

US government researchers found that wearing two masks are better than one in slowing coronavirus spread, but health officials stopped short of recommending that everyone double up.The Centres for Disease Control and Prevention on Wednesday reported the results of a lab experiment that spaced two artificial heads six feet (two metres) from each other and checked to see how many coronavirus-sized particles spewed by one were inhaled by the other.The researchers found that wearing one mask –…

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