[5]Our data have been instrumental in detecting trends early like the emergence & takeover of new variants. We tracked the replacement of wt with Alpha, Delta with Omicron, then BA.1 with BA.2. We detected a small number of Omicron recombinants in our latest data (5 XE & 3 XL).

[4]“These trends are concerning since when a very high number of people are infected, this may lead to more people becoming seriously ill and needing to go to hospital. “Although restrictions have ended, I would urge people to still behave cautiously." - Prof Paul Elliott

[3] Our data show that infections have risen in all age groups and remain highest in primary school-aged children, with almost 1 in 10 (8.81%) 5-11-year-olds testing positive. However infections were falling or flattening in younger age groups while increasing in those aged 55+.

[2] We found that 6.37% of the population in England was infected in March. This is more than double our previous findings when 1 in 35 had the virus in Feb and 40% higher than the first Omicron peak in Jan. Read our preprint on the Omicron 'twin peaks': spiral.imperial.ac.uk/handle…

"The REACT Programme has become one of the world’s biggest studies of community COVID-19 testing and has been instrumental in tracking the progress of the epidemic - I know this study has been an invaluable source of data for policy makers all over the world." - Sir Tony Blair

Over 3 million people have taken part in our REACT study, helping us better understand England's #COVID19 situation and guide decisions to keep people safe. Find out how you can make a difference by participating in REACT. If you've been invited, please do take one simple test.

Over 2 million people in England have taken 1 simple test at home to make a huge difference to efforts to keep communities safer during the pandemic. By participating in our REACT study, you're helping us track the #COVID19 virus and stay vigilant. Thank you for taking part.

Watch @profhelenward, one of the leads of our REACT study, discussing our research that's working to better understand the treat #LongCOVID. YouTube link 👉 youtu.be/J4M4qWU-7DM

Have you been invited to take part in our #REACT study? If you've received a letter, make sure you respond and complete your sign up to the study. Then all you need to do is take one simple test & return your swab, helping us continue our vital research. reactstudy.org

Over 100,000 people took part in our latest REACT-1 study, revealing important data about the effectiveness of booster vaccines and doses in school-aged children. It's thanks to them that our study is possible. If you're invited to take part, please do take one simple test.