Nose virus may explain brain fog in long COVID

NCT ID NCT05220241

Completed Knowledge-focused Sponsor: Fondation Ophtalmologique Adolphe de Rothschild Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at 51 adults who had COVID-19 2 to 12 months earlier and still had brain fog or other thinking problems. Researchers checked if the virus was still hiding in the nose's smell center. They compared these patients to a control group to see if lingering virus is linked to ongoing cognitive symptoms.

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Conditions

The condition(s) this trial relates to.

cognitive disorder Cognitive Dysfunction COVID-19 post-COVID-19 disorder

As listed by the trial registrant

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

COGNITIVE DISORDER SARS-COV-2 INFECTION

Contacts and locations

Locations

Hôpital Fondation A. de Rothschild

Paris, 75019, France
Hôpital Lariboisière-Fernand-Widal

Paris, 75010, France

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