Nearly 97,000 french volunteers help map COVID-19 spread
NCT ID NCT04392388
First seen Jan 11, 2026 · Last updated Jun 22, 2026 · Updated 29 times
Summary
This completed study enrolled nearly 97,000 people from existing French health cohorts to track how many had been infected with SARS-CoV-2. Researchers used blood tests to detect antibodies and studied how infection rates varied across different groups. The goal was to better understand the spread of COVID-19 and how long immunity might last.
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Genom att skicka in godkänner du våra Användarvillkor
Contacts and locations
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Locations
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Inserm
Paris, France
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 could help public health officials better understand how COVID-19 spreads and how long antibodies last in the general population.
What could go wrong
This is an observational study, not a treatment trial. It cannot directly lead to a cure or vaccine, and results may not apply to other countries or populations.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.