# Real-world Evidence of COVID-19 Vaccines Effectiveness

> **NCT04981405** · — · TERMINATED · sponsor: **Ivan S Moiseev** · enrollment: 182 (actual)

## Conditions studied

- COVID-19 Pneumonia

## Interventions

- **BIOLOGICAL:** COVID-19 Vaccines

## Key facts

- **NCT ID:** NCT04981405
- **Lead sponsor:** Ivan S Moiseev
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** TERMINATED
- **Start date:** 2021-07-16
- **Primary completion:** 2022-07-19
- **Final completion:** 2022-07-19
- **Target enrollment:** 182 (ACTUAL)
- **Why stopped:** low recruitment, end of COVID-19 pandemic
- **Last updated:** 2022-07-22

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04981405

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04981405, "Real-world Evidence of COVID-19 Vaccines Effectiveness". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04981405. Licensed CC0.

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