#COVID19 – do masks help? What the literature says, by @zoeharcombe https://go.shr.lc/2w8PmBg  via @jacq_pow
Why masks give a false sense of security, w/ @ArrudaHoracio, Quebec's director of public health http://www.cbc.ca/player/play/1713204803628/ via @JustinEss1 #COVID19
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