# A Clinical Trial of Quadrivalent Influenza Vaccine in Children Aged 3-8 Years Old

> **NCT04997239** · PHASE4 · COMPLETED · sponsor: **Sinovac Biotech Co., Ltd** · enrollment: 600 (actual)

## Conditions studied

- Seasonal Influenza

## Interventions

- **BIOLOGICAL:** Two doses of quadrivalent influenza vaccine
- **BIOLOGICAL:** One dose of quadrivalent influenza vaccine

## Key facts

- **NCT ID:** NCT04997239
- **Lead sponsor:** Sinovac Biotech Co., Ltd
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-10-10
- **Primary completion:** 2021-10-30
- **Final completion:** 2021-11-20
- **Target enrollment:** 600 (ACTUAL)
- **Last updated:** 2022-08-11


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04997239

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04997239, "A Clinical Trial of Quadrivalent Influenza Vaccine in Children Aged 3-8 Years Old". Retrieved via AI Analytics 2026-06-04 from https://api.ai-analytics.org/clinical/NCT04997239. Licensed CC0.

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