Influenza vaccine effectiveness over 17 seasons in a large Japanese cohort: Analyses by age, virus type, underlying diseases and seasons before the COVID-19 pandemic
Seasonal influenza vaccines showed moderate effectiveness, especially in individuals < 40 years and those without comorbidities. Effectiveness declined with age, underscoring the need for improved vaccines and targeted strategies for older adults.
Authors
- Tetsunari Maeda
- Ietaka Satoh
- Naoki Kawai (ORCID: https://orcid.org/0000-0002-3259-7353)
- Takashi Kawashima (ORCID: https://orcid.org/0000-0001-7741-3995)
- Shinro Matsuura
- Osame Tanaka
- Hideyuki Ikematsu (ORCID: https://orcid.org/0000-0002-3548-4231)
- Kazuo Mori
- William Lee (ORCID: https://orcid.org/0000-0002-0650-1442)
- Kenichi Doniwa
- Takuma Bando
- Seizaburo Kashiwagi
- Midori Yoshimura
- S. Nagao
Institutions
- Japan Medical Association (JP)
Publication Details
- Journal
- Journal of Infection and Public Health
- Published
- 2025-08-25
- DOI
- https://doi.org/10.1016/j.jiph.2025.102934
- Primary Topic
- Influenza Virus Research Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00