Even improper usage of N95s give much more protection than a surgical with a mask brace. https://www.cidrap.umn.edu/news-perspective/2021/10/commentary-what-ca

Even improper usage of N95s give much more protection than a surgical with a mask brace. https://www.cidrap.umn.edu/news-perspective/2021/10/commentary-what-can-masks-do-part-1-science-behind-covid-19-protection https://www.cidrap.umn.edu/news-perspective/2021/10/commenta...