ghost Posted May 5, 2020 Share Posted May 5, 2020 Video: See how a mask affects how a cough travels Link to comment Share on other sites More sharing options...
ghost Posted May 5, 2020 Author Share Posted May 5, 2020 Video : Talking with and without a mask (courtesy The New England Journal of Medicine ©2020) Link to comment Share on other sites More sharing options...
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