Masks, social distancing, nose patch tests: For K-12 children returning to school after summer vacation, these unpleasant coronavirus control measures are far from over. Until classes resume in the fall, children under the age of 12 are unlikely to be vaccinated against COVID-19. But a new study found that when elementary school students wear masks at school and keep a certain distance, on average, infected children may be less likely to spread the infection to other students than other students. 30-day course. However, if the school abandons masks, abandons efforts to reduce child mixing, and fails to detect and isolate people who may be infected, an epidemic will definitely occur, model exercises show. However, these outbreaks are not necessarily large-scale, which makes the local school board and the mayor face difficult choices.