Hospitalization and Mortality Risk for COVID-19 Cases With SARS-CoV-2 AY.4.2 (VUI-21OCT-01) Compared to Non-AY.4.2 Delta Variant Sublineages

Tommy Nyberg*, Katie Harman, Asad Zaidi, Shaun R. Seaman, Nick Andrews, Sophie G. Nash, Andre Charlett, Jamie Lopez Bernal, Richard Myers, Natalie Groves, Eileen Gallagher, Saheer Gharbia, Meera Chand, Simon Thelwall, Daniela De Angelis, Gavin Dabrera, Anne M. Presanis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

To investigate if the AY.4.2 sublineage of the SARS-CoV-2 delta variant is associated with hospitalization and mortality risks that differ from non-AY.4.2 delta risks, we performed a retrospective cohort study of sequencing-confirmed COVID-19 cases in England based on linkage of routine health care datasets. Using stratified Cox regression, we estimated adjusted hazard ratios (aHR) of hospital admission (aHR = 0.85; 95% confidence interval [CI],. 77-.94), hospital admission or emergency care attendance (aHR = 0.87; 95% CI,. 81-.94), and COVID-19 mortality (aHR = 0.85; 95% CI,. 71-1.03). The results indicate that the risks of hospitalization and mortality are similar or lower for AY.4.2 compared to cases with other delta sublineages.

Original languageEnglish
Pages (from-to)808-811
Number of pages4
JournalJournal of Infectious Diseases
Volume226
Issue number5
DOIs
Publication statusPublished - 1 Sept 2022

Bibliographical note

Funding Information:
This work was supported by the United Kingdom Research and Innovation Medical Research Council (UKRI MRC) (unit programme numbers MC_UU_00002/11 to D. D. A. and A. M. P., and MC_UU_00002/10 to S. R. S.); UKRI MRC/ Department of Health and Social Care National Institute for Health Research (NIHR) COVID-19 Rapid Response Call (grant number MC_PC_19074 to T. N., A. C., D. D. A., and A. M. P.); NIHR Health Protection Unit in Behavioural Science and Evaluation (to D. D. A.); and NIHR Cambridge Biomedical Research Centre (grant number BRC-1215-20014).

Funding Information:
Potential conflicts of interest. G. D. declares that his employer, UK Health Security Agency, previously known as Public Health England, received funding from GlaxoSmithKline for a research project related to influenza antiviral treatment. This preceded and had no relation to COVID-19, and G. D. had no role in and received no funding from the project. All other authors report no potential conflicts. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed.

Publisher Copyright:
© 2022 The Author(s). Published by Oxford University Press for the Infectious Diseases Society of America.

Keywords

  • AY.4.2
  • COVID-19
  • SARS-CoV-2
  • VUI-21OCT-01
  • hospitalization
  • mortality

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