Rapid COVID test vs. gold standard: study aimed to see if cheap antigen tests work for contact tracing

NCT ID NCT04745533

Terminated Diagnosis Sponsor: Juan Fernando Masa Jiménez Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study planned to compare a rapid antigen detection test against the standard PCR test for diagnosing COVID-19 in people who were close contacts of infected patients but had no symptoms. The goal was to see if the quick, inexpensive antigen test could reliably identify contagious individuals during quarantine. However, the study was withdrawn before enrolling any participants, so no data were collected.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: Antigen detection test (rapid diagnostic test)
What this could lead to: If successful, this could show that cheap, rapid antigen tests are reliable for screening asymptomatic contacts, helping to quickly identify contagious people and slow virus spread.
What could go wrong: The study was withdrawn before any participants were enrolled, so no results are available. Antigen tests are less sensitive than PCR, especially in people without symptoms, so they might miss some infections.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

severe acute respiratory syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

SARS-COV INFECTION

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