nutritionalconcepts.comJun 12, 20201 min readWidespread facemask use could shrink the ‘R’ number and prevent a second COVID-19 wave – studyhttps://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-could-shrink-the-r-number-and-prevent-a-second-covid-19-wave-study
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