1 2 3 4 5Īlthough uncertainties remain about the size of effect from including cloth face coverings in a package of measures for reducing transmission, the weight of evidence from laboratory and observational studies justifies their use. 1 Cloth face coverings, if correctly worn, can reduce transmission of the virus as part of a set of protective measures, including maintaining physical distance from others and good hand hygiene. Wearing face coverings, particularly in shared indoor spaces, is now mandated or recommended in more than 160 countries to reduce transmission of SARS-CoV-2. Unfounded concerns about risk compensation threaten public health when they delay the introduction of protective measures such as wearing of face coverings, argue Theresa Marteau and colleagues
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