WITH MASK MANDATE: 27 cases per day per 100K people; NO MASK MANDATE: 17 cases per day per 100K people.”

Daniel Horowitz. Blaze Media Op Ed. Comprehensive analysis of 50 states shows greater spread with mask mandates. December 2020. https://www.theblaze.com/op-ed/horowitz-comprehensive-analysis-of-50-states-shows-greater-spread-with-mask-mandates