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Strasbourg hospital staff antibody study reveals infection spread

NCT ID NCT04441684

Knowledge-focused Sponsor: University Hospital, Strasbourg, 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study looked at how many hospital workers in Strasbourg, France, had antibodies against the virus that causes COVID-19. About 1,466 staff members were tested to see if they had been infected, especially after a large outbreak linked to a religious event. The goal was to understand how far the virus spread among healthcare workers and how their immune systems responded.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

1,466 people

The number who actually took part.

Started

Apr 2020

Finished

Jul 2021

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.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Any person, male or female, over 18 years of age at the time of signing the consent * Any person affiliated to a social health insurance scheme * Any person able to understand the objectives and risks related to research and to give an informed, dated and signed consent * Any person who is part of HUS staff and working at HUS at the time of the pandemic, including residents affiliated with HUS and assigned to general hospitals in the region * Any symptomatic person with a positive COVID result (PCR + group) or negative (PCR- group) with a RT-PCR test carried out at least 10 days before inclusion, or any person, for which no COVID PCR was performed (group " No PCR") Exclusion Criteria: * Person in exclusion period (determined by a previous or ongoing study), * Inability to give clear information (person in an emergency, difficulty understanding the subject, etc.) * Person under safeguard of justice * Person under guardianship or curatorship

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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.

SARS-CoV-2 serological status SARS-CoV-2 seroprevalence

Contacts and locations

Locations

  • Hôpitaux Universitaires de Strasbourg - Centre d'Investigation Clinique - Nouvel Hôpital Civil et Hautepierre

    Strasbourg, France