Well, now you're being deliberately obtuse, didn't bother to read the link, or perhaps both. The link I posted above compared the symptomology of COVID-related brain damage to moderate TBI. As the American Association of Neurological Surgeons says at https://www.aans.org/Patients/Neurosurgical-Conditions-and-T... :
> Patients with moderate head injuries fare less well. Approximately 60 percent will make a positive recovery and an estimated 25 percent left with a moderate degree of disability. Death or a persistent vegetative state will be the outcome in about 7 to 10 percent of cases. The remainder of patients will have a severe degree of disability.
Lack of sleep also significantly impacts the performance on neuropsychological testing. The question is not what kind of symptoms Covid can cause, but how long they last.
> Patients with moderate head injuries fare less well. Approximately 60 percent will make a positive recovery and an estimated 25 percent left with a moderate degree of disability. Death or a persistent vegetative state will be the outcome in about 7 to 10 percent of cases. The remainder of patients will have a severe degree of disability.