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What countries are affected by Japanese encephalitis?

Page last updated 03 April 2020

Japanese encephalitis is found mostly in Asia - from India in the west to North and South Korea, and Japan in the northeast. It is also found from Thailand, Singapore, and Malaysia in the south, to Indonesia, Timor, and Papua New Guinea in the southeast.

Only five cases have been identified as acquired in Australia; and none have been identified since 1998. All other cases diagnosed in Australia have been acquired overseas.


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Sources & Citations

1. Australian Government, Department of Health. The Australian Immunisation Handbook. Japanese encephalitis. Available at: (accessed 10 March 2020).

9. Centers for Disease Control and Prevention. Chapter 4 – Travel-related infectious diseases - Japanese Encephalitis. Available at: (accessed 10 March 2020).

SPANZ.IMOJ.18.04.0141(1)a - Date of preparation March 2020