# The Immune Response to Influenza Vaccinations in Elderly Individuals

> **NCT03266237** · PHASE4 · COMPLETED · sponsor: **National University Hospital, Singapore** · enrollment: 240 (actual)

## Conditions studied

- Influenza

## Interventions

- **DRUG:** Vaxigrip®

## Key facts

- **NCT ID:** NCT03266237
- **Lead sponsor:** National University Hospital, Singapore
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2013-12
- **Primary completion:** 2016-05
- **Final completion:** 2016-05
- **Target enrollment:** 240 (ACTUAL)
- **Last updated:** 2017-08-30

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03266237

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03266237, "The Immune Response to Influenza Vaccinations in Elderly Individuals". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT03266237. Licensed CC0.

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