Japanese encephalitis is a virus related to dengue fever, yellow fever, and West Nile viruses, and is spread by infected mosquitos. This disease is most prevalent in Southeast Asia and East Asia, including the Indian subcontinent. Japanese encephalitis causes inflammation of the brain. In most cases, symptoms are mild, and include fever, headaches, and are resolved without treatment. In rare cases, more severe symptoms include very high fever, disorientation, coma, seizures and long term nerve and brain damage. About 1 in 4 of severe cases of Japanese Encephalitis is fatal.
The World Health Organization recommends the Japanese encephalitis vaccine for anyone travelling to regions in which Japanese encephalitis is a recognized public health concern.
World Health Organization
Japanese Encephalitis, countries or areas at risk
- Ixiaro Vaccine Product Monograph (PDF Download)
- Government of Canada Resource on Japanese Encephalitis for Travellers
- World Health Organization Map of countries where Hepatitis B is prevalent