# COVID-19 Vaccine For Indirect Protection

> **NCT04818736** · PHASE4 · WITHDRAWN · sponsor: **McMaster University**

## Conditions studied

- Vaccine Preventable Disease

## Interventions

- **BIOLOGICAL:** COVID-19 Vaccination
- **OTHER:** Usual care

## Key facts

- **NCT ID:** NCT04818736
- **Lead sponsor:** McMaster University
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2021-04-15
- **Primary completion:** 2021-09
- **Final completion:** 2021-12
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Vaccine roll out plans increased so timing was no longer feasible
- **Last updated:** 2021-05-14

## Collaborators

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- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04818736

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04818736, "COVID-19 Vaccine For Indirect Protection". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT04818736. Licensed CC0.

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