# Combined Immunization of COVID-19 Inactivated Vaccine With QIV and PPV23

> **NCT05298800** · PHASE4 · UNKNOWN · sponsor: **Centers for Disease Control and Prevention, China** · enrollment: 3000 (estimated)

## Conditions studied

- Safety
- Immunogenicity, Vaccine
- COVID-19 Vaccines
- Influenza Vaccines
- Pneumococcal Vaccines

## Interventions

- **BIOLOGICAL:** Vaccine

## Key facts

- **NCT ID:** NCT05298800
- **Lead sponsor:** Centers for Disease Control and Prevention, China
- **Sponsor class:** OTHER_GOV
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-10-08
- **Primary completion:** 2022-12-31
- **Final completion:** 2023-12-31
- **Target enrollment:** 3000 (ESTIMATED)
- **Last updated:** 2022-03-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05298800

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05298800, "Combined Immunization of COVID-19 Inactivated Vaccine With QIV and PPV23". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT05298800. Licensed CC0.

---

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