PMC:7784787 / 622-740
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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7784787","sourcedb":"PMC","sourceid":"7784787","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7784787","text":"ghlights both penetration through the mask fabric and leakage around the edges of the mask. A large variation in both ","tracks":[]}