# Age and Response to Flu Vaccines

> **NCT03328325** · PHASE4 · COMPLETED · sponsor: **National Institute of Allergy and Infectious Diseases (NIAID)** · enrollment: 152 (actual)

## Conditions studied

- Influenza
- Influenza Immunisation

## Interventions

- **BIOLOGICAL:** Influenza Virus Quadrivalent Inactivated Vaccine
- **BIOLOGICAL:** Influenza Virus Quadrivalent Inactivated Vaccine

## Key facts

- **NCT ID:** NCT03328325
- **Lead sponsor:** National Institute of Allergy and Infectious Diseases (NIAID)
- **Sponsor class:** NIH
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-12-14
- **Primary completion:** 2020-02-09
- **Final completion:** 2020-04-20
- **Target enrollment:** 152 (ACTUAL)
- **Last updated:** 2021-05-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03328325

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03328325, "Age and Response to Flu Vaccines". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT03328325. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*