# Third Dose Vaccination With AstraZeneca or Pfizer COVID-19 Vaccine Among Adults Received Sinovac COVID-19 Vaccine

> **NCT05049226** · PHASE2 · COMPLETED · sponsor: **Mahidol University** · enrollment: 1250 (actual)

## Conditions studied

- COVID-19 Infection
- COVID-19 VACCINE

## Interventions

- **BIOLOGICAL:** AstraZeneca ChAdOx1 AZD1222 vaccine (AZ) full dose
- **BIOLOGICAL:** Pfizer/BioNTech BNT162b2 vaccine (PF) full dose
- **BIOLOGICAL:** AstraZeneca ChAdOx1 AZD1222 vaccine (AZ) half dose
- **BIOLOGICAL:** Pfizer/BioNTech BNT162b2 vaccine (PF) half dose

## Key facts

- **NCT ID:** NCT05049226
- **Lead sponsor:** Mahidol University
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-09-24
- **Primary completion:** 2022-02-22
- **Final completion:** 2022-02-22
- **Target enrollment:** 1250 (ACTUAL)
- **Last updated:** 2022-07-06

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05049226

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05049226, "Third Dose Vaccination With AstraZeneca or Pfizer COVID-19 Vaccine Among Adults Received Sinovac COVID-19 Vaccine". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT05049226. Licensed CC0.

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