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. 2022 Oct 13;10:990400. doi: 10.3389/fpubh.2022.990400

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Characteristics of states overlapping with mandating masks in the transmission of COVID-19 during the periods of a mandatory stay-at-home (SAH) order. (A) The infected cases in no-MFM states (n = 31) have a significantly lower incidence rate than the overlapping MFM states (n = 12) with SAH order. (B) There is no significant difference in the SAH period between the no-MFM and MFM states. (C) The average daily positive cases in no-MFM states showed significantly fewer numbers than the MFM states. There are no significant differences in total positive cases (D) and average daily cases (E) per state population density between the MFM and no-MFM states. Each bar represents the mean ± SE. *p < 0.05 vs. MFM states.