drugset / Trial / NCT02957890
Immunogenicity of Twice-annual Influenza Vaccination in Older Adults in Hong Kong
Phase 4
Active not recruiting
400 enrolled
The University of Hong Kong
Centers for Disease Control and Prevention · collabHospital Authority, Hong Kong · collab
RandomizedParallel-groupTriple-blindPrevention
Summary
This study evaluates the immunogenicity of adding inactivated influenza vaccine with southern hemisphere (SH) formulation to standard once-annual influenza vaccination with northern hemisphere (NH) formulation in older adults in Hong Kong over 9 years. Half of participants will receive twice-annual influenza vaccination with NH and SH formulation, while the other half will receive once-annual influenza vaccination with NH formulation and a placebo.
Timeline
- Start
- 2016-11-18
- Primary completion
- 2025-09
- Completion
- 2026-09
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | FluQuadri | Vaccine | 60 ug | — |
| Subject | FluQuadri | Vaccine | 0.5 ml | — |
| Subject | Influenza Virus Vaccine | Vaccine | 45 ug | — |
| Subject | Influenza Virus Vaccine | Vaccine | 0.5 ml | — |