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Physical distancing, face masks, and eye protection to prevent person-to-person transmission of SARS-CoV-2 and COVID-19: a systematic review and meta-analysis
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Chu, D.K.; E.A Akl, S. Duda, et al. (2020) CC
Source:  https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(20)31142-9.pdf

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