There were 40 outbreaks of Covid-19 in schools last week, according to the latest data from the Health Protection Surveillance Centre.
An outbreak is when two or more related cases are identified in a setting. There were 34 outbreaks in primary schools, three in secondary schools and three in special schools.
The outbreaks related to a total of 191 cases of the virus. It compares to just 12 outbreaks recorded in schools the week before last - but schools had only just reopened at that stage.