Influenza vaccine effectiveness against influenza A during the delayed 2022/23 epidemic in Shihezi, China

Vaccine. 2023 Sep 7;41(39):5683-5686. doi: 10.1016/j.vaccine.2023.08.039. Epub 2023 Aug 19.

Abstract

After the temporary end of COVID-19 in China in February 2023, the influenza epidemic peaked in March across many Chinese places. We recruited a total of 258 all-age subjects presenting influenza-like illness (ILI) in Shihezi city, China from January 1 to March 16, 2023, and tested for influenza virus infection. Using a test-negative design, we assessed influenza vaccine effectiveness (VE) of 56.3% (95% CrI: 13.6, 73.6) against medically attended, influenza illness during the delayed 2022/23 influenza epidemic. The findings contributed to the continuous monitoring of the influenza vaccine performance across the world, especially in the "post-COVID" pandemic era.

Keywords: China; Epidemic; Influenza; Test-negative design; Vaccine effectiveness.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • COVID-19*
  • China / epidemiology
  • Humans
  • Influenza Vaccines*
  • Influenza, Human* / epidemiology
  • Influenza, Human* / prevention & control
  • Pandemics / prevention & control
  • Vaccine Efficacy

Substances

  • Influenza Vaccines