Mask Mandate Prevented COVID-19 Deaths in Minnesota

Michael J. Maloney

Proof School

As the number of COVID-19 deaths in the US increased, various policies were enacted in an effort to slow the spread of the pandemic. As sufficient data accumulate over time, the impact of policy on public health outcomes may be statistically evaluated. The present paper uses ODA to evaluate the hypothesized ability of Minnesota’s limited mask mandate (MM) to reduce the daily number of COVID-19 deaths. Validity sensitivity analysis showed that chance-corrected reduction in the number of daily deaths began the day after the MM, and maximum reduction occurred 20 days after the MM.

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