Findings from COVID-19 round 12 REACT-1 study

Between rounds 11 (15 April to 3 May) and 12 (20 May to 7 June), national prevalence has increased from 0.10% to 0.15% and there is exponential growth with a doubling time of 11 days and an R number of 1.44 in England during round 12. Delta variant now account for 90% of UK cases

Department of Health and Social Care