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French hospital staff antibody study reveals infection patterns

NCT ID NCT04481529

Knowledge-focused Sponsor: University Hospital, Limoges 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study tested over 1,500 hospital workers in four French hospitals for COVID-19 antibodies to see how many had been infected. Researchers compared infection rates among staff in COVID-19 units, other care areas, and non-care roles, and across regions with different outbreak intensities. The goal was to understand exposure risks and help protect healthcare workers in future waves.

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 hospitals better understand which staff are at highest risk of infection and improve protection strategies.
What could go wrong
This is an observational study, not a treatment trial. Results may not apply to other regions or time periods, and antibody tests can miss past infections.

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

1,576 people

The number who actually took part.

Started

Jul 2020

Finished

Oct 2023

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Who is studied

Hospital staff

Ages

18 years and older

Sex

Anyone

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: * Hospital staff from Argenteuil, Belfort, Dijon and Limoges hospitals. * Age ≥ 18 years old * Participation agreement Exclusion Criteria: * Protected persons * Refusal of participation

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Conditions

The condition(s) this trial relates to.

viral infectious disease

As listed by the trial registrant

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

Infection viral

Contacts and locations

Locations

  • CH Argenteuil - Service de Réanimation

    Argenteuil, Argenteuil, 95107, France

  • CHU Dijon - Serve de Réanimation

    Dijon, Dijon, 21079, France

  • CHU de Limoges

    Limoges, France

  • Ch Belfort

    Belfort, 90000, France

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