"Figure 4: Percentage of pupils testing positive for SARS-CoV-2 antibodies","" "England, 3 to 20 November 2020 (Round 1) and 30 November to 11 December 2020 (Round 2)","" "","" "Notes","1. In order to ensure consistent comparisons only the 11 local authorities with coverage in rounds 1 and 2, with at least two primary and two secondary schools in the sample, are included in the total figures provided. These are not necessarily the same schools or participants tested between rounds. 2. Estimates have been weighted and are representative of the ethnicity, gender and age for all pupils in the sampled local authorities. 3. All results are provisional and subject to revision." "Unit","%" "","" "","% positive for current infection","Lower 95% confidence interval","Upper 95% confidence interval" "Primary school pupils Round 1","7.65","5.87","9.77" "Primary school pupils Round 2","9.05","7.33","11.00" "","","","" "Secondary school pupils Round 1","10.95","8.78","13.45" "Secondary school pupils Round 2 ","13.45","11.67","15.40"