Mass masking in the COVID-19 epidemic: people need guidance.

Lancet

Institute of Applied Health Research, University of Birmingham, Birmingham, UK.

Published: March 2020

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7133583PMC
http://dx.doi.org/10.1016/S0140-6736(20)30520-1DOI Listing

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