How many kids had COVID? antibody study reveals hidden infections

NCT ID NCT04355533

First seen Jan 08, 2026 · Last updated May 15, 2026 · Updated 15 times

Summary

This study tested over 1,000 children and their parents for COVID-19 antibodies to find out how many had been infected, including those without symptoms. Researchers also checked for active virus in nose, saliva, and stool samples. The goal was to better understand how the virus spreads in families and who develops immunity.

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Contacts and locations

Locations

  • Hôpital necker Enfants-Malades

    Paris, 75015, France

Conditions

Explore the condition pages connected to this study.