Counties in states with statewide mask mandates were 43% less likely to have rapid increases in #COVID19 cases during the summer of 2020. Nonmetropoli…


Counties in states with statewide mask mandates were 43% less likely to have rapid increases in #COVID19 cases during the summer of 2020. Nonmetropolitan counties were 67% less likely. For more information see @AnnalsOfEpi: https://bit.ly/3qOqshn

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