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Study tracks virus shedding in COVID-19 contacts

NCT ID NCT04259892

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

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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.

Study facts

What this study's own registry entry says, in plain language.

Participants

324 people

The number who actually took part.

Started

Feb 2020

Finished

Aug 2021

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

The study population is represented by all subjects who had a contact with laboratory-confirmed SARS-CoV-2 cases and whose contact was considered to be at high/moderate risk of SARS-CoV-2 acquisition. This include both children and adult subjects, and healthcare workers. It may also include subject without social security in some countries, according to local legislation.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. High/moderate risk contact with a laboratory-confirmed SARS-CoV-2 case; 2. Within the 14 days following the last contact with a laboratory-confirmed SARS-CoV-2 case; 3. Obtaining informed consent. Exclusion Criteria: * Subject deprived of freedom * Subject under a legal protective measure

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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

More trials for these conditions

Other studies related to the condition(s) this trial covers.