Surgical masks reduce COVID-19 spread, large-scale study shows https://med.stanford.edu/news/all-news/2021/09/surgical-masks-covid-19.html https://med.stanford

Surgical masks reduce COVID-19 spread, large-scale study shows https://med.stanford.edu/news/all-news/2021/09/surgical-masks-covid-19.html https://med.stanford.edu/news/all-news/2021/09/surgical-mask... Even cloth masks reduced transmission, and "reduce the overall likelihood of experiencing symptoms of respiratory illness during the study period."