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134,000 french volunteers help uncover COVID-19's spread and social impact

NCT ID NCT05336604

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This completed study enrolled over 134,000 people aged 15 and older across France to track COVID-19 antibodies and how living conditions affected the epidemic. Participants provided blood samples at home and answered questions about their health, work, and housing. The goal was to estimate how many people had been infected and understand social factors influencing the virus's spread.

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 help public health officials better understand how COVID-19 spreads and how living conditions affect the epidemic.
What could go wrong
This is an observational study, not a treatment trial. It cannot prove cause and effect, and results may not apply to other countries or later variants.

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

134,391 people

The number who actually took part.

Started

May 2020

Finished

May 2023

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

Population-based sample based on a national random probability sample from the administrative sample frame: all individuals aged 15 years or older on January 1, 2020, living in mainland France or one of three overseas departments (Martinique, Guadeloupe and Réunion Island). Due to the poor quality of the sampling frame, poor internet access and the use of multiple languages, two other overseas departments, French Guiana and Mayotte, were excluded from the study.

Ages

15 years and older

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: * individuals aged 15 years or older * living on January 1, 2020, in mainland France or one of three overseas departments (Martinique, Guadeloupe and Réunion Island). Exclusion Criteria: * individuals living in prisons at the time of the study * people living in residential institutions for dependent elderly persons, as caregivers were not available during the epidemic period to help them with internet access or phone calls.

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As listed by the trial registrant

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

General population

Contacts and locations

Locations

  • Inserm U1018

    Le Kremlin-Bicêtre, France

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