From the Introduction: "The purpose of this document is to provide clear and actionable guidance for safe operations through the prevention, early detection and control of COVID-19 [coronavirus disease 2019] in schools and other educational facilities. The guidance, while specific to countries that have already confirmed the transmission of COVID-19, is still relevant in all other contexts. Education can encourage students to become advocates for disease prevention and control at home, in school, and in their community by talking to others about how to prevent the spread of viruses. Maintaining safe school operations or reopening schools after a closure requires many considerations but, if done well, can promote public health."
World Health Organization; UNICEF; International Federation of Red Cross and Red Crescent Societies
World Health Organization: https://www.who.int/