Journal
CLINICAL INFECTIOUS DISEASES
Volume 73, Issue 9, Pages 1703-1706Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/cid/ciab101
Keywords
COVID-19; mask policy; quasi-experimental design; hospitalizations; mortality
Categories
Funding
- National Institute of Allergy and Infectious Diseases, National Institutes of Health [K01-AI131895]
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Ecological analyses of US states showed lower case-rate slopes after implementation of mask requirements, supporting statewide mask requirements to mitigate transmission of COVID-19.
In ecologic analyses of US states, piecewise multivariable models showed lower case-rate slopes after implementation of mask requirements: -1.0% (95% confidence interval, -1.34% to -.57%) and -0.44% (-.86% to -.03%) per 100 000 per day in early- and late-adopter states, respectively, compared with never-adopter states. Our findings support statewide mask requirements to mitigate transmission of coronavirus disease 2019.
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