"Figure 1: Pupils “ever testing” positive for antibodies","" "England, 03 November 2020 to 6 July 2021 (Round 1 to Round 6)","" "","" "Notes","1. Data from 14 local authorities; Bradford is not included as data were not available for both primary and secondary schools. 2. Round 6 (14 June to 6 July 2021) figures have been adjusted to account for the sensitivity and specificity of the antibody test." "Unit","Percentages" "","" "","Percent testing positive","Lower 95% confidence interval","Upper 95% confidence interval" "Primary school pupils - Round 6","11.25","8.93","13.90" "Primary school pupils - ever positive ","15.30","13.50","17.24" "Secondary school pupils - Round 6","12.95","11.62","14.37" "Secondary school pupils - ever positive ","17.29","16.28","18.33"