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Mask-wearing cuts Covid incidence by 53%, says global study.

Mask-wearing is the single most effective public health measure at tackling Covid, reducing incidence by 53%, the first global study of its kind shows...

https://www.theguardian.com/world/2021/nov/17/wearing-masks-single-most-effective-way-to-tackle-covid-study-finds?fbclid=IwAR1Fwui9XrriAD-gCvXwsChPj708KV1gAAca5Mlrs-7WFKb_WHHsYo1TGBg



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