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Covid-19 Restrictions on Behavior
Covid-19 2020-04 part three
Wearning Masks for Covid-19, through May 2020

unclear whether masks reduce the spread of Covid-19      web

webhttps://www.livescience.com/are-face-masks-effective-reducing-coronavirus-spread.html
authorStephanie Pappas
publicationLiveScience
date2020-04-12

Documents:
virus shedding in breath and efficacy of face masks
webNancy H. L. Leung, Daniel K. W...Nature Medicine2020-04-03
virus shedding in breath and efficacy of face masks (pdf)
webNancy H. L. Leung, Daniel K. W...Nature Medicine2020-04-03

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