Real-time Assessment of Community Transmission findings
The Real-time Assessment of Community Transmission (REACT) programme is the largest, most significant piece of research looking at how the virus is spreading across the country.
The study was commissioned by the Department of Health and Social Care and carried out by a world-class team of scientists, clinicians and researchers at Imperial College London, Imperial College Healthcare NHS Trust and Ipsos MORI.
REACT study findings
15 December - REACT-1 round 7 updated report: regional heterogeneity in changes in prevalence of SARS-CoV-2 infection during the second national COVID-19 lockdown in England
- Download the pre-print report
- News article: Coronavirus infections levelling off in England, REACT study shows
30 November - REACT-1 round 7 interim report: fall in prevalence of swab-positivity in England during national lockdown
- Download the pre-print report: REACT 1 round 7 interim report (PDF)
- News article: Coronavirus prevalence has fallen nationally with R below 1, REACT study shows
REACT-1 round 6 updated report: high prevalence of SARS-CoV-2 swab positivity with reduced rate of growth in England at the start of November 2020
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- Download the pre-print
- News article: Coronavirus prevalence remains high but some evidence of slowdown, REACT shows
29 October - High prevalence of SARS-CoV-2 swab positivity and increasing R number in England during October 2020: REACT-1 round 6 interim report
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- Download the pre-print
- News article: Coronavirus infections rising rapidly in England, REACT study shows
27 October 2020 - Declining prevalence of antibody positivity to SARS-CoV-2: a community study of 365,000 adults
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- Download the pre-print
- News article: Coronavirus antibody prevalence falling in England, REACT study shows
REACT-1: Summary of sample extraction and fieldwork dates, and response rates, by round
- Download our table: REACT 1 sample and fieldwork dates, and response rates (PDF)
9 October 2020 - High and increasing prevalence of SARS-CoV-2 swab positivity in England during end September beginning October 2020: REACT-1 round 5 updated report
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- Download the pre-print report
- News article: Community coronavirus infections growing nationally, REACT study shows
1 October 2020 - High prevalence of SARS-CoV-2 swab positivity in England during September 2020: interim report of round 5 of REACT-1 study
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- Download the pre-print report
- News article: Latest REACT findings show high number of coronavirus infections across England
11 September 2020 - Resurgence of SARS-CoV-2 in England: detection by community antigen surveillance
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- Download the pre-print report
- News article: ''Largest COVID-19 testing study shows cases are rising across England"
13 August 2020 - Laboratory Evaluation of SARS-CoV-2 Lateral Flow Assays for use in a national COVID-19 sero-prevalence survey
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- Download the peer-reviewed publication, published in Thorax
- News article: 'Biggest study on antibody finger-prick tests identifies promising kits'
12 August 2020 - Antibody prevalence for SARS-CoV-2 following the peak of the pandemic in England: REACT2 study in 100,000 adults
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- Download the pre-print report
- Download the supplementary figures for the report: REACT-2 Supplementary Table S1, REACT-2 Supplementary Table S2
- News article: 'Largest study on home coronavirus antibody testing publishes first findings'
12 August 2020 - Usability and acceptability of home-based self-testing for SARS-CoV-2 antibodies for population surveillance
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- Download the peer-reviewed publication, published in Clinical Infectious Diseases
- View our infographic to find out more about the study methods and findings: REACT 2 study 3 infographic (PDF)
6 August 2020 - Transient dynamics of SARS-CoV-2 as England exited national lockdown
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- Download the pre-print report
- News article: 'Latest findings from coronavirus testing programme show decline of virus in June'
11 July 2020 - Community prevalence of SARS-CoV-2 virus in England during May 2020: REACT study
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