The REACT-1 team from Imperial College London has now completed round 16 of their study looking at virus prevalence across England.
This batch of data includes around 95,000 samples collected between 23 November and 14 December 2021.
The study gives an estimate of R and an estimate of vaccine effectiveness against infection (with delta, not omicron) for 12-17 year olds.
Please note this data is a preprint, so it is early work that has not yet been through peer-review and is not published in a journal.
Prof Paul Elliott, FMedSci, Director of the REACT programme, and Chair in Epidemiology and Public Health Medicine, Imperial College London
Prof Graham Cooke, Professor of Infectious Diseases, Imperial College London
This Briefing was accompanied by and SMC Roundup of Comments.