# Immune Response of an Interchangeable Booster Vaccine Against COVID-19 Among Individuals With Risk Factors for Severity

> **NCT05289206** · NA · UNKNOWN · sponsor: **Fundação de Medicina Tropical Dr. Heitor Vieira Dourado** · enrollment: 4446 (actual)

## Conditions studied

- Comorbidities and Coexisting Conditions
- Healthy

## Interventions

- **OTHER:** Vaccine - ChAdOx1-S/nCoV-19 [recombinant]

## Key facts

- **NCT ID:** NCT05289206
- **Lead sponsor:** Fundação de Medicina Tropical Dr. Heitor Vieira Dourado
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-09-30
- **Primary completion:** 2022-03-31
- **Final completion:** 2022-05-30
- **Target enrollment:** 4446 (ACTUAL)
- **Last updated:** 2022-05-05

## Collaborators

- [object Object]
- [object Object]
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- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05289206

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05289206, "Immune Response of an Interchangeable Booster Vaccine Against COVID-19 Among Individuals With Risk Factors for Severity". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT05289206. Licensed CC0.

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