Infectious mononucleosis (IM) complicated with a neurological manifestation, including acute cerebellar ataxia, Guillain-Barre syndrome, meningitis, encephalitis, cranial
[ncbi.nlm.nih.gov]
[…] blood cells involved in clotting Heart problems — an inflammation of the heart muscle (myocarditis) Complications involving the nervous system — meningitis, encephalitis and Guillain-Barre
[mayoclinic.com]
syndrome Swollen tonsils — which can block breathing The Epstein-Barr virus can cause much more serious illness in people who have impaired immune systems, such as people
[mayoclinic.com]