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.