Japanese encephalitis (JE) IgM antibody test results with the CDC JE IgM antibody capture ELISA (MAC-ELISA) and InBios JE Detect MAC-ELISA for serum samples collected on days 28, 180, and 365 following vaccination of 268 children with live attenuated SA14-14-2 JE vaccine. The gene discussed is CD40LG; the disease is Japanese encephalitis.