Jonas Vlachos in a study about schools and COVID among parents and teachers

Limited transmission of COVID-19 from open schools but teachers were affected.

Most countries introduced school closures during the spring of 2020 despite substantial uncertainty regarding the effectiveness in containing SARS-CoV-2. In Sweden, upper secondary schools moved online while lower secondary schools remained open. A comparison of parents with children in the final year of lower secondary and first year of upper secondary school shows that keeping the former open had limited consequences for the overall transmission of the virus. However, the infection rate doubled among lower secondary teachers relative to upper secondary ones.

Read the whole study