New blood test could reveal hidden COVID-19 infections

NCT ID NCT04418206

Completed Knowledge-focused Sponsor: Centre Hospitalier Universitaire de Nice Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a blood test called ELISpot to see if it can detect the body's immune response to the COVID-19 virus. The test aims to find infections that standard swab tests might miss and help predict whether a person will develop mild or severe illness. Researchers enrolled 950 people, including those with confirmed or suspected COVID-19, their close contacts, and healthy volunteers.

What this could mean

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

What this could lead to: If successful, this test could help doctors better understand when someone was infected and predict whether they might develop severe COVID-19.
What could go wrong: This is an observational study, not a treatment trial. The test may not prove accurate enough for widespread use, and results may not change patient care directly.

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.

COVID-19

As listed by the trial registrant

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

COVID-19

Contacts and locations

Locations

CH Antibes

Antibes, Alpes Maritimes, 06606, France
CHU de nice

Nice, Alpes-Maritimes, 06001, France
Ch Cannes, Pneumologie

Cannes, Alpes Maritimes, 06414, France
Ch Grasse

Grasse, Alpes Maritimes, 06355, France

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