Les complications les plus courantes touchent le système nerveux central (p. ex. encéphalite [complication la plus courante], coma, névrite optique, diplopie, encéphalomyélite aiguë disséminée, confusion mentale, syndrome cérébelleux et polyradiculite, paralysie des nerfs crâniens, méningite aseptique, méningo-encéphalite, psychose aiguë).
The most common complications involve the central nervous system, and may include encephalitis (the most common), coma, optic neuritis, diplopia, acute disseminated encephalomyelitis, mental confusion, cerebellar syndrome and polyradiculitis, cranial nerve palsy, aseptic meningitis and meningoencephalitis, and acute psychosis.