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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
A 600-village cluster-randomized intervention that substantially increased community masking reduced symptomatic SARS-CoV-2 seroprevalence, with clearer benefit in surgical-mask villages and older adults.
The intervention bundled mask distribution and promotion and modestly changed distancing behavior.
Subject families