French study to reveal true COVID-19 infection rates during lockdown easing

NCT ID NCT04429594

Recruiting now Knowledge-focused Sponsor: Centre Hospitalier Universitaire de Nice Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study is following 1,000 people in the Alpes-Maritimes region of France to see how many were infected with the coronavirus during the deconfinement period. Researchers are using blood tests to measure immune responses and will also look at how air pollution might affect the immune system. The goal is to better understand the spread of the virus and its impact on health.

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 provide a clearer picture of how many people were infected with COVID-19 and how their immune systems responded, helping guide public health decisions.
What could go wrong: This is an observational study, not a treatment trial. It cannot prove cause and effect, and results may be influenced by factors like seasonality or changes in behavior.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Coronavinae infectious disease Coronaviridae infectious disease

As listed by the trial registrant

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

CORONAVIRUS INFECTIONS

Contacts and locations

Locations

University Nice Hospital
RECRUITING

Nice, 06000, France

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