# Monitoring COVID-19 Vaccination Response in Fragile Populations

> **NCT05222139** · — · COMPLETED · sponsor: **University of Bologna** · enrollment: 8894 (actual)

## Conditions studied

- SARS CoV 2 Infection
- Vaccination; Infection
- Breakthrough Infection

## Interventions

- **BIOLOGICAL:** COVID-19 vaccination

## Key facts

- **NCT ID:** NCT05222139
- **Lead sponsor:** University of Bologna
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2021-05-24
- **Primary completion:** 2023-07-16
- **Final completion:** 2024-11-30
- **Target enrollment:** 8894 (ACTUAL)
- **Last updated:** 2025-03-25

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05222139

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05222139, "Monitoring COVID-19 Vaccination Response in Fragile Populations". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT05222139. Licensed CC0.

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