Widespread reopening of schools after lockdowns and vacations is generally not linked to rising COVID-19 rates, a study of 191 countries has found, but lockdown closures will leave a 2020 “pandemic learning debt” of 300 billion missed school days. The analysis, by the Geneva-based independent educational foundation Insights for Education, said 84% of those 300 billion days would be lost by children in poorer countries, and warned that 711 million pupils were still out of school.