Face masks for COVID pass their largest test yet
▻https://www.nature.com/articles/d41586-021-02457-y
Critics of mask mandates have cited the lack of relevant randomized clinical trials, which assign participants at random to either a control group or an intervention group. But the latest finding is based on a randomized trial involving nearly 350,000 people across rural Bangladesh. The study’s authors found that surgical masks — but not cloth masks — reduced transmission of #SARS-CoV-2 in villages where the research team distributed face masks and promoted their use.