• A cluster-randomized trial on the effect of community-level mask distribution and promotion on symptomatic SARS-CoV-2 infections in rural Bangladesh (N = 342k) finds proper mask-wearing increased from 13.3% in the control group to 42.3% in the intervention arm. https://www.science.org/doi/10.1126/science.abi9069 2 comments 21/12/2021 science

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