- Surgical masks work very well in preventing spread of COVID-19, biggest ever study finds https://www.salon.com/2021/09/05/bangladesh-mask-study-interventions-covid-19/?fr=operanews 188 comments worldnews
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- Surgical masks reduce COVID-19 spread, large-scale study shows | News Center | Stanford Medicine https://med.stanford.edu/news/all-news/2021/09/surgical-masks-covid-19.html 474 comments
- Surgical masks limit covid-19 spread, say authors of Bangladesh study - The Washington Post https://www.washingtonpost.com/world/2021/09/01/masks-study-covid-bangladesh/ 2 comments
- https://www.poverty-action.org/sites/default/files/publications/Mask_RCT____Symptomatic_Seropositivity_083121.pdf 0 comments
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