# Immunogenicity and Safety Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) in Adults Aged 50 Years and Older

> **NCT00782431** · PHASE3 · COMPLETED · sponsor: **Alachua Government Services, Inc.** · enrollment: 3208 (actual)

## Conditions studied

- Influenza

## Interventions

- **BIOLOGICAL:** Vero cell derived, trivalent, seasonal influenza vaccine
- **BIOLOGICAL:** Licensed egg-derived, trivalent seasonal influenza vaccine

## Key facts

- **NCT ID:** NCT00782431
- **Lead sponsor:** Alachua Government Services, Inc.
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-11
- **Primary completion:** 2008-12
- **Final completion:** 2009-07
- **Target enrollment:** 3208 (ACTUAL)
- **Last updated:** 2026-01-02


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00782431

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00782431, "Immunogenicity and Safety Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) in Adults Aged 50 Years and Older". Retrieved via AI Analytics 2026-06-26 from https://api.ai-analytics.org/clinical/NCT00782431. Licensed CC0.

---

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