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https://ehssafetynewsamerica.com/2020/07/29/which-mask-works-best-we-filmed-people-coughing-and-sneezing-to-find-out-facemasks-covid19-facemaskeffectiveness-unsw/
Which Mask Works Best? We Filmed People Coughing And Sneezing To Find Out #FaceMasks #COVID19 #FaceMaskEffectiveness #UNSW