# Immunogenicity of Alternative Annual Influenza Vaccination Strategies in Older Adults in Hong Kong

> **NCT03330132** · PHASE4 · COMPLETED · sponsor: **The University of Hong Kong** · enrollment: 1861 (actual)

## Conditions studied

- Influenza, Human

## Interventions

- **BIOLOGICAL:** Standard inactivated influenza vaccine (NH formulation)
- **BIOLOGICAL:** MF 59 adjuvanted inactivated influenza vaccine (NH formulation)
- **BIOLOGICAL:** High-dose inactivated influenza vaccine (NH formulation)
- **BIOLOGICAL:** Recombinant hemagglutinin inactivated influenza vaccine (NH formulation)

## Key facts

- **NCT ID:** NCT03330132
- **Lead sponsor:** The University of Hong Kong
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2017-10-07
- **Primary completion:** 2025-12-31
- **Final completion:** 2025-12-31
- **Target enrollment:** 1861 (ACTUAL)
- **Last updated:** 2026-05-15

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03330132

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03330132, "Immunogenicity of Alternative Annual Influenza Vaccination Strategies in Older Adults in Hong Kong". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT03330132. Licensed CC0.

---

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