Lower Risk of Multisystem Inflammatory Syndrome in Children With the Delta and Omicron Variants of Severe Acute Respiratory Syndrome Coronavirus 2

Author:

Cohen Jonathan M12,Carter Michael J34,Cheung C Ronny56,Ladhani Shamez78,

Affiliation:

1. Paediatric Immunology and Infectious Diseases, Evelina London Children’s Hospital , London , United Kingdom

2. University College London Great Ormond Street Institute of Child Health , London , United Kingdom

3. School of Life Course and Population Sciences, King’s College London , London , United Kingdom

4. Paediatric Intensive Care Unit, Evelina London Children’s Hospital , London , United Kingdom

5. General Paediatrics Department, Evelina London Children’s Hospital , London , United Kingdom

6. Faculty of Life Sciences and Medicine, King’s College London , London , United Kingdom

7. Immunisation Division, UK Health Security Agency , London , United Kingdom

8. Paediatric Infectious Diseases Research Group, St George’s University of London , London , United Kingdom

Abstract

Abstract Little is known about the risk of multisystem inflammatory syndrome in children (MIS-C) with different severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants. In southeast England, MIS-C rates per confirmed SARS-CoV-2 infections in children aged 0–16 years were 56% lower (rate ratio [RR], 0.34 [95% confidence interval {CI}, .23–.50]) during prevaccine Delta, 66% lower (RR, 0.44 [95% CI, .28–.69]) during postvaccine Delta, and 95% lower (RR, 0.05 [95% CI, .02–.10]) during the Omicron period.

Publisher

Oxford University Press (OUP)

Subject

Infectious Diseases,Microbiology (medical)

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