>Frontera led a study that found that more than 13% of hospitalized COVID-19 patients had developed a new neurological disorder soon after being infected. A follow-up study found that six months later, about half of the patients in that group who survived were still experiencing cognitive problems.

The infection hospitalization rate for the Alpha variant was about 7% [0] so 50% of 13% of 7% means... 0.46% of patients may experience a new serious neurological complication that persists past 6 months.

Where "patients" is those aged 55-77 (with lower body mass indices, more past history of dementia, stroke and seizure, worse SOFA scores during hospitalization and higher rates of acute renal failure) [1], and...

>though we identified high rates of disability among both neurological COVID-19 patients and controls, this study was not designed to determine whether the deficits measured by these metrics are static or represent ongoing injury as suggested by some “long-hauler” and post-COVID literature. Since cognitive impairment and mood abnormalities occur in over 50% of ARDS survivors, it is possible that the level of disability we are documenting is not specific to SARS-CoV-2, but rather a result of factors related to critical viral illness.

[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895685/

[1] https://www.jns-journal.com/article/S0022-510X(21)00180-5/fu...