"the trial did not test the role of masks in source control"
-which is a key role for masks in reducing transmission *from* and infected 'source', to others
acpjournals.org/doi/10.7326/M2…
-which is a key role for masks in reducing transmission *from* and infected 'source', to others
acpjournals.org/doi/10.7326/M2…
https://twitter.com/MackayIM/status/1329174579189751809
But, you know, it had some acknowledged overall issues.
"Inconclusive results, missing data, variable adherence, patient-reported findings on home tests, no blinding, and no assessment of whether masks could decrease disease transmission from mask wearers to others."
"Inconclusive results, missing data, variable adherence, patient-reported findings on home tests, no blinding, and no assessment of whether masks could decrease disease transmission from mask wearers to others."
-there doesn't seem to have been a baseline PCR test (would have been nice, but not essential except to catch ? 
"Based on the lowest adherence reported in the mask group during follow-up, 46% of participants wore the mask as recommended, 47% predominantly as recommended, and 7% not as recommended."
-adherence is likely to matter a lot
-adherence is likely to matter a lot
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