# A Study to Learn About How Safe and Effective is 20vPnC and 13vPnC Vaccines in Chinese Adults

> **NCT07019909** · PHASE1 · COMPLETED · sponsor: **Pfizer** · enrollment: 400 (actual)

## Conditions studied

- Pneumococcal Disease

## Interventions

- **BIOLOGICAL:** 20vPnC
- **BIOLOGICAL:** 13vPnC

## Key facts

- **NCT ID:** NCT07019909
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2025-07-06
- **Primary completion:** 2026-01-28
- **Final completion:** 2026-01-28
- **Target enrollment:** 400 (ACTUAL)
- **Last updated:** 2026-02-25


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07019909

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07019909, "A Study to Learn About How Safe and Effective is 20vPnC and 13vPnC Vaccines in Chinese Adults". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT07019909. Licensed CC0.

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