# A Clinical Trial of CSL's 2009 H1N1 Influenza Vaccine (CSL425) in Healthy Adults in the USA

> **NCT00958126** · PHASE2 · COMPLETED · sponsor: **Seqirus** · enrollment: 1313 (actual)

## Conditions studied

- Influenza

## Interventions

- **BIOLOGICAL:** CSL425
- **BIOLOGICAL:** CSL425
- **BIOLOGICAL:** Placebo

## Key facts

- **NCT ID:** NCT00958126
- **Lead sponsor:** Seqirus
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2009-08
- **Primary completion:** 2009-11
- **Final completion:** 2010-04
- **Target enrollment:** 1313 (ACTUAL)
- **Last updated:** 2017-11-21


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00958126

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00958126, "A Clinical Trial of CSL's 2009 H1N1 Influenza Vaccine (CSL425) in Healthy Adults in the USA". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT00958126. Licensed CC0.

---

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