Influenza vaccine effectiveness against detected infection in the community, France, October 2024 to February 2025.

ABSTRACT: Influenza circulates at high levels in Europe since November 2024. Using a test-negative study based on data from French community laboratories between October 2024 and February 2025, we estimated vaccine effectiveness (VE) against PCR-detected influenza infection (44,420/15,052; positive/negative individuals). For all age groups, the overall VE was 42% (95% CI: 37-46%), with 26% (95% CI: 18-34%) against influenza A and 75% (95% CI: 66-82%) against influenza B. Among individuals ≥ 65-year-olds VE was 22% (95% CI: 13-30%) and among 0-64-year-olds, 60% (95% CI: 56-65%).

SUBMITTER: Blanquart F 

PROVIDER: S-EPMC11843621 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature