A decreased level of consciousness occurs in 0.5–6% of severe cases, which is attributable either to inflammation of the brain by the virus or indirectly as a result of impairment of vital organs, for example, the liver.
Smanjeno stanje svijesti javlja se u 0.5–6% težih slučajeva, što je moguće pripisati virusnoj upali mozga ili indirektno oštećenju funkcija vitalnih organa, kao npr. jetre.