Brain/physiopathology; Brain/virology; COVID-19/physiopathology; COVID-19/virology; SARS-CoV-2/pathogenicity; Animals; Antibodies, Viral/adverse effects; Antibodies, Viral/immunology; Astrocytes/virology; Autoantibodies/immunology; Autopsy; Brain/blood supply; Brain/immunology; COVID-19/immunology; COVID-19/pathology; Capillaries/virology; Cricetinae; Fatigue/complications; Fatigue/virology; Gray Matter/pathology; Humans; Immunoglobulins, Intravenous/immunology; Immunoglobulins, Intravenous/therapeutic use; Losartan/therapeutic use; Memory Disorders/complications; Memory Disorders/virology; Neurons/immunology; Organoids/virology; Pericytes/virology; Preprints as Topic; SARS-CoV-2/immunology; Stroke/complications; Stroke/virology; Vasoconstriction