Influenza Vaccine Effectiveness Against Symptomatic Influenza in Primary Care: A Test Negative Case Control Study Over Two Influenza Seasons 2022/2023 and 2023/2024 in Ireland
Influenza and Other Respiratory Viruses·
- DOI
- 10.1111/irv.70023
- PMID
- —
- PMCID
- —
- OpenAlex
- W4404982942
- Study type
- Case-control study
- Publisher
- Wiley
- Article type
- journal-article
- Integrity
- current
Why this research matters now
Continued emphasis on seasonal immunization remains critical for safeguarding vulnerable demographics and pediatric cohorts. Public health initiatives should persist in highlighting documented protective outcomes to sustain coverage rates among eligible groups.
Structured evidence summary
Research question
This investigation sought to quantify how well seasonal immunization prevents acute respiratory infections requiring primary care visits across two consecutive winter periods in Ireland.
Study design
Researchers employed a test-negative case-control framework integrated into a national primary care monitoring system. Immunization records were compared between participants with confirmed viral infections and those with negative laboratory results, while statistical models controlled for demographic and temporal variables.
Population and setting
The analysis covered individuals of all ages attending general practices throughout Ireland during the 2022–2023 and 2023–2024 respiratory virus cycles.
Main findings
Immunization demonstrated a measurable association with decreased influenza-related clinic attendance, yielding overall protective estimates of forty-two percent and thirty-five percent across the respective seasons. Youth aged two through seventeen exhibited notably higher estimated protection, reaching sixty-eight percent in the later period. These metrics indicate that routine vaccination lowers symptomatic infection probabilities in community healthcare environments.
Public-health relevance
Continued emphasis on seasonal immunization remains critical for safeguarding vulnerable demographics and pediatric cohorts. Public health initiatives should persist in highlighting documented protective outcomes to sustain coverage rates among eligible groups.
Important limitations
The summary is restricted to the supplied single-article abstract and metadata, requiring the original manuscript for decision-grade interpretation. Furthermore, the test-negative methodology depends heavily on precise symptom documentation and laboratory verification, which may introduce classification variability.
GIDS interpretation
This publication provides contextual reference material regarding regional immunization performance and primary care utilization trends. Its cataloging supports literature mapping initiatives focused on respiratory pathogen monitoring and preventive strategy evaluation without implying alignment with active outbreak tracking systems.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 9 auditable classifier relationships to diseases, places, topics, and study design.