Fig. 2

Percentage of study population recorded as a confirmed case, stratified by region. For each panel, we display the number of cases by date and by region, from 1st September 2020 to 17th December 2020. Cases in teachers were not recorded in the data prior to 12th October 2020, when the data outputs from DfE were updated (the date after which the data changed is indicated by the vertical dashed lines). The half term week for most of England is shown by the dark grey shaded region whilst the light grey shaded region represents the national lockdown in England which commenced on 5th November. a Pupils in primary schools. b Pupils in secondary schools. c Teachers in primary schools. d Teachers in secondary schools. In b, we observe a spike in cases in Greater London on a single day in late September that is a result of a single school reporting a high number of absences on that day. Given that this only occurs for 1 day, we believe that this is a data entry error