4 ms·Covid-19 spreads through air, long distance1 points by zed88 5y agomoony 5y agohttps://www.thelancet.com/action/showPdf?pii=S0140-6736%2821%2900869-2 https://www.thelancet.com/action/showPdf?pii=S0140-6736%2821...