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Canonical Source · peer reviewed study
This page documents how this source is reused across Claim by Claim. A source can support, challenge, qualify or contextualize different claims; appearing here does not imply endorsement of every linked proposition.
Evidence context
Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
Investigation
DANMASK-19 found no statistically significant reduction in SARS-CoV-2 infection from recommending surgical masks to wearers in a low-mask-use community setting.
The confidence interval allowed smaller benefit, adherence was imperfect, and the trial did not test source control.
Subject families