Study tracks virus shedding in COVID-19 contacts

NCT ID NCT04259892

Completed Knowledge-focused Sponsor: Institut National de la Santé Et de la Recherche Médicale, France Source: ClinicalTrials.gov ↗

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

Summary

This study followed 324 people who had close contact with a confirmed COVID-19 case to see how long they shed the virus. Participants provided nasal swabs and reported symptoms over 12 days. The goal was to understand transmission risks and help shape public health policies.

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 study could clarify how long and how often exposed individuals spread the virus, informing better quarantine guidelines.
What could go wrong: This is an observational study, not a treatment trial. Results may not apply to later variants or different populations.

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.

Coronavinae infectious disease COVID-19

As listed by the trial registrant

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

CORONAVIRUS

Contacts and locations

Locations

Centre Hospitalier Félix Guyon Ile de la Réunion CHU nord

Saint-Denis, 97400, France
Centre Investigation Clinique 1415 CHRU Tours - Hôpital Bretonneau

Tours, 37000, France
Centre Investigation Clinique 1417 Hôpital Cochin Bâtiment Lavoisier

Paris, 75679, France
Centre Investigation Clinique 1433 CHRU de NANCY

Nancy, 54511, France
Centre d'Investigation Clinique 1403 -CHU Lille

Lille, 59037, France
Centre d'Investigation Clinique Hôpital Saint Louis

Paris, 75010, France
Centre d'Investigation Clinique Ile de la Réunion CHU sud

Saint-Pierre, 97448, France
Centre d'investigation Clinique 1425, Hôpital Bichat Claude Bernard

Paris, 75018, France
Centre d'investigation clinique 1406 CHU Grenoble

Grenoble, 38043, France
Centre d'investigation clinique 1414 Service de Pharmacologie clinique CHU Rennes Hôpital Pontchaillou

Rennes, 35033, France
Centre d'investigation clinique 1432 Hôpital François Mitterrand CHU Bourgogne

Dijon, 21 079, France
Département maladie infectieux CHU Saint Etienne

Saint-Etienne, 42055, France
Service de Maladies infectieuses et tropicales Centre hospitalier

Cayenne, 97306, French Guiana
Service de maladies infectieuses et tropicales Hôpital Jean Minjoz CHRU Besançon

Besançon, 25030, France
Service des Maladies infectieuses et tropicales, Pôle Spécialités médicales, CHU Pellegrin

Bordeaux, 33076, France
Service des maladies infectieuses Hôpital Gabriel Montpied CHU de Clermont Ferrand

Clermont-Ferrand, 63000, France

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