Immunogenicity of Twice-annual Vaccination Against Seasonal Influenza for Two Hemispheres in Older Adults in Hong Kong - a Randomised Controlled Trial
Latest Information Update: 23 Sep 2021
At a glance
- Drugs Influenza virus vaccine (Primary)
- Indications Influenza virus infections
- Focus Pharmacodynamics
- Acronyms RETAIN
- 23 Sep 2021 Planned End Date changed from 1 Sep 2022 to 1 Sep 2026.
- 21 Sep 2021 Planned primary completion date changed from 1 Sep 2021 to 1 Sep 2025.
- 02 Aug 2017 Status changed from recruiting to active, no longer recruiting.