Influenza Vaccine Effectiveness Among Older Adults in Jiaxing, China, 2022–2025

3,214 participants aged 60+ with acute respiratory symptoms were analyzed using a test-negative case-control design across three influenza seasons (2022–2025). The dataset, authored by Yang Liu and shared on figshare, provides adjusted vaccine effectiveness estimates and subgroup analyses. It was last updated on 2026-05-27.

Use Cases

• Modeling vaccine effectiveness trends based on seasonal and demographic subgroup analyses mentioned in the description
• Assessing the impact of underlying health conditions on vaccine protection based on the described subgroup findings
• Evaluating the timing of vaccination efficacy based on the reported protection within 90 days post-vaccination
• Comparing vaccine performance against different influenza strains based on the reported effectiveness against influenza A(H1N1)

Strengths

• Includes data from 3,214 participants, providing a substantial sample size for analysis
• Covers three consecutive influenza seasons (2022–2025), allowing for temporal trend assessment
• Provides specific adjusted vaccine effectiveness percentages with confidence intervals, such as 42.5% overall protection

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment for large-scale modeling
• The dataset is small in scale (62.0 KB), indicating limited scope and likely aggregated summary data rather than individual patient records

Provenance

Source

figshare

Collection Method

Test-negative case-control study

Time Range

2022–2025

Freshness

Last updated 2026-05-27 19:26:24; freshness should be verified

Geography

Jiaxing, China