Studies such as this https://www.cam.ac.uk/research/news/widespread-facemask-use-could-shrink-the-r-number-and-prevent-a-second-covid-19-wave-study https://www.

Studies such as this https://www.cam.ac.uk/research/news/widespread-facemask-use-could-shrink-the-r-number-and-prevent-a-second-covid-19-wave-study https://www.cam.ac.uk/research/news/widespread-facemask-use-... Widespread spread mask usage in Japan and South Korea has proven very effective as well at controlling the virus and allowing life to go back to normal