simon43 Posted February 6, 2018 Author Share Posted February 6, 2018 I think people wearing cheap face masks are breathing the same air as the rest of us I'm not an expert, but these people are: https://www.ncbi.nlm.nih.gov/pubmed/9487666 "Performance of N95 respirators: filtration efficiency for airborne microbial and inert particles" which concludes with: "N95 respirators provide excellent protection against airborne particles when there is a good face seal." Link to comment Share on other sites More sharing options...
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