Questions for ‘Got back-to-school COVID-19 questions? We’ve got answers’
![child removing a mask to eat lunch in a school cafeteria](https://www.snexplores.org/wp-content/uploads/2021/08/080521_SG_back-to-school_feat_1440-1030x580.jpg)
Universal masking in schools is key to blocking transmission of COVID-19, research shows. This picture shows an elementary school student in Louisville, Ky., popping her mask back on after finishing her lunch.
Jon Cherry/Getty Images