Incidence of Omicron Variant Reinfection and Reduction of Reinfection Risk After Coronavirus Disease 2019 Vaccination in Children

Tatsuki Ikuse; Yuta Aizawa; Satoshi Hasegawa; Masashi Takahashi; Takanori Hayashi; Miyako Kon; Tsutomu Tamura; Haruki Matsumoto; Akihiko Saitoh

doi:10.1093/jpids/piad093

Incidence of Omicron Variant Reinfection and Reduction of Reinfection Risk After Coronavirus Disease 2019 Vaccination in Children

J Pediatric Infect Dis Soc. 2023 Dec 16;12(12):634-637. doi: 10.1093/jpids/piad093.

Authors

Tatsuki Ikuse¹, Yuta Aizawa¹, Satoshi Hasegawa², Masashi Takahashi³, Takanori Hayashi³, Miyako Kon³, Tsutomu Tamura³, Haruki Matsumoto⁴, Akihiko Saitoh¹

Affiliations

¹ Department of Pediatrics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
² Patient Coordinate Center, Niigata Prefectural Office, Niigata, Japan.
³ Department of Virology, Niigata Prefectural Institute of Public Health and Environmental Science, Niigata, Japan.
⁴ Department of Health and Welfare, Niigata Prefectural Office, Niigata, Japan.

PMID: 37936292
DOI: 10.1093/jpids/piad093

Abstract

Data are limited on the incidence of coronavirus disease 2019 (COVID-19) reinfection in children. This population-based cohort study in Niigata, Japan from January to November 2022 demonstrated the incidence of reinfection was 1337/48 099 (2.8%), and the hazard ratio for reinfection in vaccinated children was 0.29 (95% confidence interval, 0.20-0.40).

Keywords: SARS-CoV-2; children; omicron variant; reinfection; vaccine.

© The Author(s) 2023. Published by Oxford University Press on behalf of The Journal of the Pediatric Infectious Diseases Society. All rights reserved. For permissions, please e-mail: [email protected].

MeSH terms

COVID-19* / epidemiology
COVID-19* / prevention & control
Child
Cohort Studies
Humans
Incidence
Reinfection / epidemiology
Reinfection / prevention & control
SARS-CoV-2

Supplementary concepts

SARS-CoV-2 variants