CD40LG and Japanese encephalitis: In light of the changing epidemiology of JE in Nepal, the introduction of JE vaccination in endemic areas, the reliance on a single serum IgM anti-JE antibody measurement in most previous studies, and the lack of up-to-date published data, we sought to describe the epidemiology and clinical characteristics of patients with JE diagnosed in a tertiary hospital which provides medical care for Chitwan and its neighboring districts.