With dozens of researchers at Yale, Stanford, Berkeley and IPA and several other organizations, we ran a cluster randomized trial involving almost 350,000 people and 600 villages in Bangladesh to assess the impact of community masking on COVID.
— Jason Abaluck (@Jabaluck) Sep 1, 2021
via Twitter https://twitter.com/Jabaluck
September 01, 2021 at 05:30PM
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