Coronavirus face masks: how effective are they? The evidence so far – Business Insider – Business Insider

When reports emerged that a strange new illness was spreading in Wuhan, China, Elaine Shuo Feng, an epidemiologist and statistician, was in her hometown of Tianjin, more than 730 miles from the disease’s epicenter.
There, everyone sprang into action, she sai… [+10720 natural pools]

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