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Resurgence of SARS-CoV-2: Detection by community viral surveillance.

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TLDR
In this paper, a community-wide national representative surveillance program in England based on self-administered swab results from ~594,000 individuals tested for SARS-CoV-2, regardless of symptoms, between May and the beginning of September 2020.
Abstract
Surveillance of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has mainly relied on case reporting, which is biased by health service performance, test availability, and test-seeking behaviors. We report a community-wide national representative surveillance program in England based on self-administered swab results from ~594,000 individuals tested for SARS-CoV-2, regardless of symptoms, between May and the beginning of September 2020. The epidemic declined between May and July 2020 but then increased gradually from mid-August, accelerating into early September 2020 at the start of the second wave. When compared with cases detected through routine surveillance, we report here a longer period of decline and a younger age distribution. Representative community sampling for SARS-CoV-2 can substantially improve situational awareness and feed into the public health response even at low prevalence.

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Persistent COVID-19 symptoms in a community study of 606,434 people in England

TL;DR: In this article , the authors used data from rounds 3-5 of the REACT-2 study (n = 508,707; September 2020- February 2021) to estimate the prevalence and identify predictors of persistent symptoms lasting 12 weeks or more; and unsupervised learning to cluster individuals by reported symptoms.
Posted ContentDOI

Persistent symptoms following SARS-CoV-2 infection in a random community sample of 508,707 people

TL;DR: In this paper, the authors used uni-and multivariable models to identify predictors of persistence of symptoms (12 weeks or more) and estimated the prevalence of symptom persistence at 12 weeks, and used unsupervised learning to cluster individuals by symptoms experienced.
Journal ArticleDOI

Exponential growth, high prevalence of SARS-CoV-2, and vaccine effectiveness associated with the Delta variant.

Paul Elliott, +592 more
- 02 Nov 2021 - 
TL;DR: In this article, the authors assessed RT-PCR swab-positivity in the REAL-time Assessment of Community Transmissibility (RACT) in many countries associated with the Delta variant.
Journal ArticleDOI

Rapid increase in Omicron infections in England during December 2021: REACT-1 study

TL;DR: In this article , the authors analyzed the prevalence of SARS-CoV-2 and its dynamics in England from the end of November to mid-December 2021 among almost 100,000 participants in the REACT-1 study.
References
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Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK.

Merryn Voysey, +81 more
- 09 Jan 2021 - 
TL;DR: ChAdOx1 nCoV-19 has an acceptable safety profile and has been found to be efficacious against symptomatic COVID-19 in this interim analysis of ongoing clinical trials.
Journal ArticleDOI

Social contacts and mixing patterns relevant to the spread of infectious diseases.

TL;DR: This study provides the first large-scale quantitative approach to contact patterns relevant for infections transmitted by the respiratory or close-contact route, and the results should lead to improved parameterisation of mathematical models used to design control strategies.
Journal ArticleDOI

Estimating the effects of non-pharmaceutical interventions on COVID-19 in Europe.

TL;DR: The results show that major non-pharmaceutical interventions and lockdown in particular have had a large effect on reducing transmission and continued intervention should be considered to keep transmission of SARS-CoV-2 under control.
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