Article 1 COVID-19 1 Disease Outbreaks 1 Humans 1 Japan 1 Models, Statistical 1 Pandemics 1 Schools 1 clinical decision making 1 clinical effectiveness 1 clinical feature 1 clinical outcome 1 controlled study 1 coronavirus disease 2019 1 education program 1 epidemic 1 epidemiological data 1 evidence based practice 1 health care policy 1 human 1 infection control 1 infection risk 1 infection sensitivity 1 pandemic 1 prevention and control 1 risk reduction 1 school 1 school health service 1 statistical model 1 voluntary event cancellation and school closure