# A Clinical Trial to Evaluate the Safety and Immunogenicity of PPV23 Vaccine Revaccinated in 60-70 Years Old

> **NCT04700618** · PHASE4 · COMPLETED · sponsor: **China National Biotec Group Company Limited** · enrollment: 330 (actual)

## Conditions studied

- Vaccination

## Interventions

- **BIOLOGICAL:** 23-valent pneumococcal polysaccharide vaccine

## Key facts

- **NCT ID:** NCT04700618
- **Lead sponsor:** China National Biotec Group Company Limited
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-03-21
- **Primary completion:** 2021-08-22
- **Final completion:** 2022-02-13
- **Target enrollment:** 330 (ACTUAL)
- **Last updated:** 2022-02-16

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04700618

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04700618, "A Clinical Trial to Evaluate the Safety and Immunogenicity of PPV23 Vaccine Revaccinated in 60-70 Years Old". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT04700618. Licensed CC0.

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