# COVID-19 Contact Study by Antigen Detection Test

> **NCT04745533** · — · WITHDRAWN · sponsor: **Juan Fernando Masa Jiménez**

## Conditions studied

- SARS-CoV Infection

## Interventions

- **DIAGNOSTIC_TEST:** Antigen detection test

## Key facts

- **NCT ID:** NCT04745533
- **Lead sponsor:** Juan Fernando Masa Jiménez
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** WITHDRAWN
- **Start date:** 2021-02-15
- **Primary completion:** 2021-04-30
- **Final completion:** 2021-06-30
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Lack of financing. Furthermore, antigen tests were incorporated into contact detection, so the study lost interest.
- **Last updated:** 2026-04-29


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04745533

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04745533, "COVID-19 Contact Study by Antigen Detection Test". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04745533. Licensed CC0.

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