The real-time infection hospitalisation and fatality risk across the COVID-19 pandemic in England

Thomas Ward (), Martyn Fyles, Alex Glaser, Robert S. Paton, William Ferguson and Christopher E. Overton
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Thomas Ward: Analytics and Surveillance
Martyn Fyles: Analytics and Surveillance
Alex Glaser: Analytics and Surveillance
Robert S. Paton: Analytics and Surveillance
William Ferguson: Analytics and Surveillance
Christopher E. Overton: Analytics and Surveillance

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract The COVID-19 pandemic led to 231,841 deaths and 940,243 hospitalisations in England, by the end of March 2023. This paper calculates the real-time infection hospitalisation risk (IHR) and infection fatality risk (IFR) using the Office for National Statistics Coronavirus Infection Survey (ONS CIS) and the Real-time Assessment of Community Transmission Survey between November 2020 to March 2023. The IHR and the IFR in England peaked in January 2021 at 3.39% (95% Credible Intervals (CrI): 2.79, 3.97) and 0.97% (95% CrI: 0.62, 1.36), respectively. After this time, there was a rapid decline in the severity from infection, with the lowest estimated IHR of 0.32% (95% CrI: 0.27, 0.39) in December 2022 and IFR of 0.06% (95% CrI: 0.04, 0.08) in April 2022. We found infection severity to vary more markedly between regions early in the pandemic however, the absolute heterogeneity has since reduced. The risk from infection of SARS-CoV-2 has changed substantially throughout the COVID-19 pandemic with a decline of 86.03% (80.86, 89.35) and 89.67% (80.18, 93.93) in the IHR and IFR, respectively, since early 2021. From April 2022 until March 2023, the end of the ONS CIS study, we found fluctuating patterns in the severity of infection with the resumption of more normative mixing, resurgent epidemic waves, patterns of waning immunity, and emerging variants that have shown signs of convergent evolution.

Date: 2024
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DOI: 10.1038/s41467-024-47199-3

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