Mask Science #4 - Masks less than 1% effective against Covid-19

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In this study infection with SARS-CoV-2 occurred in 42 participants wearing masks (1.8%) and 53 control participants without wearing masks (2.1%).
A total of 3030 participants were randomly assigned to the recommendation to wear masks, and 2994 were assigned to control; 4862 completed the study. Infection with SARS-CoV-2 occurred in 42 participants recommended masks (1.8%) and 53 control participants (2.1%). The between-group difference was −0.3 percentage point

https://www.greenmedinfo.com/article/study-infection-sars-cov-2-occurred-42-participants-wearing-masks-18-and-53-co

https://www.acpjournals.org/doi/10.7326/M20-6817