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Volume 32, Number 8—August 2026

Dispatch

Case-Fatality Risk of Norovirus, England, 2022–2025

Maria L. TangComments to Author , Amy Douglas, Cristina Celma, Roberto Vivancos, Gauri Godbole, Thomas Ward, and Jonathon Mellor
Author affiliation: UK Health Security Agency, London, UK (M.L. Tang, A. Douglas, C. Celma, R. Vivancos, G. Godbole, T. Ward, J. Mellor); University of Oxford, Oxford, UK (A. Douglas); National Institute for Health and Care Research, Norwich, UK (R. Vivancos); University of Warwick, Coventry, UK (R. Vivancos).

Main Article

Figure 2

Predicted 14-day case-fatality risk after a positive norovirus test result in England during the 2022–23 and 2024–25 seasons. A) Calendar quarter beginning January 2023. B) Calendar quarter beginning January 2024. C) Calendar quarter beginning April 2024. D) Calendar quarter beginning January 2025. Data represent model-predicted probabilities of death within 14 days after a positive norovirus test result; shading indicates 95% CIs, estimated by using the positive test results from the Modular Open Laboratory Information System. Predictions are shown for the modal region (North West), stratified by norovirus genotype and time period. Time-period facets were chosen to reflect periods of peak activity in each season; 2 periods are shown for the 2023–24 season to reflect periods of GII.4 or GII.17 genotype dominance.

Figure 2. Predicted 14-day case-fatality risk after a positive norovirus test result in England during the 2022–23 and 2024–25 seasons. A) Calendar quarter beginning January 2023. B) Calendar quarter beginning January 2024. C) Calendar quarter beginning April 2024. D) Calendar quarter beginning January 2025. Data represent model-predicted probabilities of death within 14 days after a positive norovirus test result; shading indicates 95% CIs, estimated by using the positive test results from the Modular Open Laboratory Information System. Predictions are shown for the modal region (North West), stratified by norovirus genotype and time period. Time-period facets were chosen to reflect periods of peak activity in each season; 2 periods are shown for the 2023–24 season to reflect periods of GII.4 or GII.17 genotype dominance.

Main Article

Page created: June 28, 2026
Page updated: July 17, 2026
Page reviewed: July 17, 2026
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