A Clinical Trial to Evaluate the Safety and Immunogenicity of PPV23 Vaccine Revaccinated in 60-70 Years Old
Clinical trial NCT04700618 · COMPLETED
Trial details
- NCT number
- NCT04700618
- Sponsor
- China National Biotec Group Company Limited
- Status
- COMPLETED
- Phase
- Phase 4
- Study type
- INTERVENTIONAL
- Start date
- 2021-03-21
- Primary completion
- 2021-08-22
- Enrollment
- 330
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