Summary
What is already known about this topic?
Masks are an important part of a multicomponent prevention strategy to limit transmission of SARS-CoV-2. Some school jurisdictions required masks in K–12 schools for fall 2021, while others did not.
What is added by this report?
In Arkansas during August–October 2021, districts with universal mask requirements had a 23% lower incidence of COVID-19 among staff members and students compared with districts without mask requirements.
What are the implications for public health practice?
Masks remain an important part of a multicomponent approach to prevent COVID-19 in K–12 settings, especially in communities with high levels of COVID-19.
Entire content available on: https://www.cdc.gov/mmwr/volumes/71/wr/mm7110e1.htm
