A nine-month-girl, was admidtted to local pediatric hospital A on 4 September with rapidly progressive encephalopathy,She was febrile on 13 August. At the admission, she had a temperature of 38.3 C, and was drowsy. Neck stiffness, positive Kernig’s sign, uncontrolled shaking of the body and hypertonia were also present. No rash was noticed. Eleven day prior to the onset of fever, she received the live attenuated JE vaccine.