Evaluating the effectiveness of the influenza vaccine in young children in Taiwan

Influenza Vaccine Effectiveness in Inpatient and Outpatient Settings Among Young Children in Taiwan

Observational National Taiwan University Hospital · NCT06446232

This study is testing how well the flu vaccine works to protect young children in Taiwan who have been diagnosed with influenza.

Quick facts

Study typeObservational
Enrollment1 (estimated)
Ages6 Months to 18 Years
SexAll
SponsorNational Taiwan University Hospital Academic / other
Locations1 site (Taipei)
Trial IDNCT06446232 on ClinicalTrials.gov

What this trial studies

This observational study aims to assess the effectiveness of the influenza vaccine in protecting young children aged 6 months to under 18 years who are diagnosed with influenza. The study will enroll approximately 350 children who are either admitted to the emergency department or hospitalized due to influenza. Researchers will collect data on the children's vaccination status and analyze it statistically to determine the vaccine's protective effects against influenza. The findings could provide valuable insights into vaccine efficacy in this age group.

Who should consider this trial

Good fit: Ideal candidates for this study are young children aged 6 months to under 18 years who have a clinical diagnosis of influenza.

Not a fit: Patients with unknown vaccination status will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could help establish the effectiveness of the influenza vaccine in preventing severe illness in young children.

How similar studies have performed: Other studies have shown varying degrees of success in evaluating vaccine effectiveness, but this specific focus on young children in Taiwan may provide novel insights.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Clinical diagnosis of influenza by Flu A+B rapid antigen test
* Known vaccination status

Exclusion Criteria:

* Unknown vaccination status

Where this trial is running

Taipei

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Influenza Vaccine AllergyInfluenza Vaccine
Last reviewed 2026-06-10 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.