The effect of school closure on COVID-19 cases and mortality has been examined in multiple studies.
In a study that looked specifically at school closure in the United States, closure of schools was associated with 1.37 million fewer cases and 40,600 fewer deaths from COVID-19 in a six-week study period. However, two international studies examining the impact of reopening schools from kindergarten to grade 12 found no consistent relationship between the reopening of these schools and the spread of COVID-19, with another study from the United States showing no increased risk to childcare workers who continued to work. Other studies that looked at multiple policy changes have shown more modest changes associated with school closure.