![A Long Covid patient takes a pulmonary function test at Hufeland Clinic's Centre for Pneumology. Getty Images](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/UWGDF5BVAVEF3P3MJ52LU7JGCE.jpg?smart=true&auth=06005eca3184553281a035eeb2438bdf446d022bfa299b88c193de02cff9ac13&width=400&height=225)
A Long Covid patient takes a pulmonary function test at Hufeland Clinic's Centre for Pneumology. Getty Images
A Long Covid patient takes a pulmonary function test at Hufeland Clinic's Centre for Pneumology. Getty Images
Long Covid: Cause of brain fog discovered
Brain vessel integrity disrupted in patients with lingering symptoms, research finds