The CDC recommends that all students, teachers, and staff at K-12 schools wear masks to protect children and the community against the spread of COVID-19. Along with COVID-19 vaccination, mask-wearing can play an important role in ending the pandemic. Especially in schools where children under 12 can’t yet get vaccinated, masks are a critical line of defense against the spread of COVID-19.

Data show that wearing masks in schools is effective in preventing COVID-19 outbreaks and keeping children safe. A CDC study found that schools without mask requirements were 3.5 times more likely to have COVID-19 outbreaks than schools that started the fall 2021 school year with mask requirements. In another analysis of 520 U.S. counties, the CDC found that in places where schools did not have mask requirements, pediatric COVID-19 cases rose at a  higher rate than in counties where schools do require masks.

Updated October 12, 2021