# AZD1222 Vaccine for the Prevention of COVID-19

> **NCT04540393** · PHASE3 · WITHDRAWN · sponsor: **AstraZeneca**

## Conditions studied

- COVID-19

## Interventions

- **BIOLOGICAL:** AZD1222

## Key facts

- **NCT ID:** NCT04540393
- **Lead sponsor:** AstraZeneca
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2020-09-02
- **Primary completion:** 2020-12-04
- **Final completion:** 2022-05-11
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** The study was put on hold in September 2020 due to a safety concern in another trial but never restarted. In the meantime our clinical development program now includes a similar study with a different design, which we prefer to complete now.
- **Last updated:** 2021-10-01

## Collaborators

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- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04540393

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04540393, "AZD1222 Vaccine for the Prevention of COVID-19". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04540393. Licensed CC0.

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