Researchers at Trinity College Dublin have linked 'brain fog' in long-Covid patients to disruptions in the brain's blood supply system.

Elevated levels of a certain protein in blood samples suggest a compromised blood-brain barrier in these patients.

Imaging techniques showed more contrast agent leakage into brain tissue, confirming the disruption.

This discovery is expected to alter the understanding and treatment of post-viral neurological diseases.

The prevalence of Long Covid, which includes symptoms like brain fog, is estimated at 6-15% among those who have contracted Covid-19.

The implications of the study extend to other neurological conditions potentially caused by viral infections.

Further research is being conducted on the role of the blood-brain barrier in neurological disorders.