Are face masks useful for limiting the spread of COVID-19?

Are face masks useful for limiting the spread of COVID-19? Hong Kong Med J. 2020 Jun 05;: Authors: Law SK, Leung AWN, Xu C PMID: 32536613 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/32536613?dopt=Abstract

Source: Hong Kong Med J - June 4, 2020 Category: General Medicine Authors: Law SK, Leung AWN, Xu C Tags: Hong Kong Med J Source Type: research

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