Found from Pakistan through SE Asia, Japan, India, Eastern Russia and the Philippines. Transmitted by mosquitoes.
Diagnose with serology on blood or csf.
Could it be......encephalitis. But most (99%) are asymptomatic but 1 in 4 who get encephalitis die and at least 30% of the rest have neurological sequella.
Supportive. There is a vaccine (and it cross reacts with West Nile virus).
"JEV originated from its ancestral virus in the mid 1500s in the Indonesia-Malaysia region and evolved there into different genotypes, which then spread across Asia (PubMed)."
Last update: 05/05/18