在坚持戴口罩的美国各州，COVID-19发病率较低

A new state-by-state analysis shows a statistical association between high adherence to mask wearing and reduced rates of COVID-19 in the U.S. Charlie Fischer and colleagues at the Boston University School of Public Health in Massachusetts present these findings in the open-access journal《公共科学图书馆•综合》4月14日。

在新冠肺炎大流行期间，不同的州制定了不同的佩戴口罩政策，有的州不要求佩戴口罩，有的州要求佩戴口罩面具总共公共空间。了解面膜之间的联系和Covid-19税率可以帮助通知政策，以减轻对医疗保健系统的压力，经济不稳定和死亡。

To help clarify the effects of mask wearing, Fischer and colleagues examined publicly available data on mask-wearing policies, people's self-reported habits on mask wearing in public, and COVID-19 rates for all 50 U.S. states and Washington, D.C. They accounted for a one-month delay between mask wearing and its subsequent potential impact on COVID-19 rates from May through October 2020. For this analysis, they considered rates of more than 200 cases per 100,000 residents to be high.

分析表明，在15个状态下，不需要人们在公共场合佩戴面具，14个具有高Covid-19速率。与此同时，八个国家的自我报告的依从性率为75％，这些国家都没有高Covid-19率。依从性率最低的国家在随后的月份具有最高的Covid-19率的可能性。

在接下来的一个月里，戴口罩率至少达到75%的8个州的COVID-19发病率平均为109.26 / 10万，而戴口罩率低于75%的8个州的COVID-19发病率平均为239.99 / 10万。

这些发现提供了新的证据，支持戴口罩是有助于降低COVID-19发病率的一个主要因素。他们建议，减少COVID-19传播的政策和公共卫生努力应包括重点改进口罩依从性在整个美国

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