# A Study to Learn About How a New Pneumococcal Vaccine Works in Children

> **NCT06531538** · PHASE2 · COMPLETED · sponsor: **Pfizer** · enrollment: 225 (actual)

## Conditions studied

- Pneumococcal Disease

## Interventions

- **BIOLOGICAL:** PG4
- **BIOLOGICAL:** 20-valent pneumococcal conjugate vaccine (20vPnC)

## Key facts

- **NCT ID:** NCT06531538
- **Lead sponsor:** Pfizer
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2024-07-30
- **Primary completion:** 2026-02-09
- **Final completion:** 2026-02-09
- **Target enrollment:** 225 (ACTUAL)
- **Last updated:** 2026-03-11


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06531538

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06531538, "A Study to Learn About How a New Pneumococcal Vaccine Works in Children". Retrieved via AI Analytics 2026-09-04 from https://api.ai-analytics.org/clinical/NCT06531538. Licensed CC0.

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