"Figure 1: Around 1 in 7 people tested positive for antibodies in the 28 days up to 18 January 2021 in England","" "Estimated percentage of those testing positive for antibodies to SARS-CoV-2 from a blood sample, by 28-day periods, 12 May 2020 to 18 January 2021, England","" "","" "Notes","1. All results are provisional and subject to revision. 2. These statistics refer to infections reported in the community, by which we mean private households. These figures exclude infections reported in hospitals, care homes and/or other institutional settings." "Unit","Percentage" "","" "28-day period ending","% testing positive for COVID-19 antibodies","Lower confidence limit","Upper confidence limit" "8 June 20","6.5","4.4","9.2" "6 July 20","7.1","5.4","9.2" "3 Aug 20","6.1","4.8","7.7" "31 Aug 20","5.6","4.8","6.5" "28 Sep 20","5.9","5.3","6.7" "26 Oct 20","6.9","6.4","7.5" "23 Nov 20","9.0","8.4","9.6" "21 Dec 20","10.7","10.2","11.3" "18 Jan 21","15.3","14.7","15.9"