Effectiveness of inactivated COVID-19 vaccine CoronaVac in children aged less than 3 years old during Omicron wave in Hong Kong

W H S Wong; D L Leung; K M Yip; H K So; J S Rosa Duque; Y L Lau

doi:10.1016/j.vaccine.2024.02.067

Effectiveness of inactivated COVID-19 vaccine CoronaVac in children aged less than 3 years old during Omicron wave in Hong Kong

Vaccine. 2024 Apr 2;42(9):2135-2137. doi: 10.1016/j.vaccine.2024.02.067. Epub 2024 Mar 7.

Authors

W H S Wong¹, D L Leung¹, K M Yip¹, H K So¹, J S Rosa Duque², Y L Lau³

Affiliations

¹ Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China.
² Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China. Electronic address: jsrduque@hku.hk.
³ Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Hong Kong SAR, China. Electronic address: lauylung@hku.hk.

PMID: 38453618
DOI: 10.1016/j.vaccine.2024.02.067

Abstract

The COVID-19 pandemic has affected people of all ages worldwide. However, there is still no information on the vaccine effectiveness (VE) of inactivated COVID-19 vaccines in children aged less than 3 years old. This study highlighted that 2 doses of CoronaVac were effective in preventing COVID-19, with a VE of 83.1 %.

Keywords: COVID-19; CoronaVac; Omicron; Vaccine; Young children.

MeSH terms

COVID-19 Vaccines*
COVID-19* / prevention & control
Child
Child, Preschool
Hong Kong / epidemiology
Humans
Pandemics
Vaccines, Inactivated*

Substances

sinovac COVID-19 vaccine
COVID-19 Vaccines
Vaccines, Inactivated