Japanese encephalitis, a mosquito-borne flavivirus, is the main cause of viral encephalitis in Asia. With approximately 67,000 cases and up to 20,000 deaths reported each year, Japanese encephalitis is the most frequent and most severe viral encephalitis, and the leading cause of viral neurological infection among children in Asia 1.
As there is no cure for the disease, treatment focuses on relieving severe clinical signs and supporting the patient to overcome the infection 2.

World Immunization Week

Japanese encephalitis infographics


Next generation vaccine against Japanese encephalitis

Video - Shadow lives "Shadow Lives" - The human toll of japanese encephalitis

Produced by the NGO PATH


  1. WHO. Japanese encephalitis vaccines WHO position paper. Weekly Epidemiological Record. 25 August 2015. No.34/35, 2006, 81:325-340.
  2. WHO. Fact sheet N°386. December 2015. Updated December 2015. Accessed January 2018. Retrieved from: https://www.who.int/en/news-room/fact-sheets/detail/japanese-encephalitis
  3. Radoslaw Ziemba. Directions and opportunities for immunoprophylaxis development among Polish Army soldiers sent to foreign missions. Medical Science Monitoring.2011; 17(12): SR43-52. Accessed January 2018. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628145/pdf/medscimonit-17-12-sr43.pdf

This page last update: 09-2019