# Efficacy of Hepatitis B Vaccine Boosters Among Neonatally Vaccinated Children in Chongqing

> **NCT03867643** · — · UNKNOWN · sponsor: **Children's Hospital of Chongqing Medical University** · enrollment: 80 (estimated)

## Conditions studied

- Hepatitis B Vaccine Adverse Reaction

## Interventions

- **BIOLOGICAL:** hepatitis B vaccine(HepB)

## Key facts

- **NCT ID:** NCT03867643
- **Lead sponsor:** Children's Hospital of Chongqing Medical University
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-07-09
- **Primary completion:** 2021-09-09
- **Final completion:** 2025-12-31
- **Target enrollment:** 80 (ESTIMATED)
- **Last updated:** 2022-03-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03867643

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03867643, "Efficacy of Hepatitis B Vaccine Boosters Among Neonatally Vaccinated Children in Chongqing". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT03867643. Licensed CC0.

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