Influenza vaccination effectiveness in preventing influenza hospitalization in children, Hong Kong, winter 2019/20

Vaccine. 2020 Dec 3;38(51):8078-8081. doi: 10.1016/j.vaccine.2020.10.081. Epub 2020 Nov 6.

Abstract

The winter influenza season 2019/20 in Hong Kong was predominated by influenza A(H1N1)pdm09. We analysed an on-going test-negative design study consisting of 1227 children admitted for febrile acute respiratory illness from 3 November 2019 (week 45) to 21 March 2020 (week 12). We estimated influenza vaccine effectiveness of 65% (95% CI: 46 - 78) against hospitalization due to influenza A and B combined, and 74% (95% CI: 54 - 85) against hospitalization due to influenza A(H1N1)pdm09.

Keywords: Children; Hospitalization; Influenza; Vaccine effectiveness.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Case-Control Studies
  • Child
  • Hong Kong / epidemiology
  • Hospitalization
  • Humans
  • Influenza A Virus, H1N1 Subtype*
  • Influenza A Virus, H3N2 Subtype
  • Influenza Vaccines*
  • Influenza, Human* / epidemiology
  • Influenza, Human* / prevention & control
  • Seasons
  • Vaccination

Substances

  • Influenza Vaccines