As in other confined spaces, the most important measures to prevent the spread of infection in schools include: effective indoor air isolation during illness, policies to promote hand hygiene and regular hand washing when it will be possible (consideration). Physical distancing measures should aim to reduce the number of people in shelters or closed areas, while ensuring school education. Physical distancing can be achieved by: grouping classrooms and groups based on risk of infection and status (i.e. social distancing) ensuring physical distancing in the classroom (e.g. sharing desks) minimizing arrival times, and meal and break times outside .