Persistent Autonomic and Immunologic Abnormalities in Neurologic Post-Acute Sequelae of SARS-CoV2 Infection - PubMed
NIH study on 7 Neuro-PASC patients (ages 42-63) found 71% of initial abnormalities, like autonomic and immunologic issues, persisted after 1 year.
Persistent signs include central catecholamine deficiency and MRI changes.
Brain injury a common consequence of both COVID-19 and influenza
"The present study demonstrated elevated concentrations of brain injury biomarkers in COVID-19 patients...correlated with the presence of autoantibodies and proinflammatory cytokines...(and) evidence of dysregulated immune response even after four months"