Surveillance of Japanese encephalitis
Learn about Japanese encephalitis surveillance.
On this page
How many cases of Japanese encephalitis are there?
In 2012, the World Health Organization estimated 67,900 Japanese encephalitis cases annually.
Largely as a result of immunization, the incidence of Japanese encephalitis has been declining in:
- Japan
- Nepal
- Vietnam
- Thailand
- Sri Lanka
- the Republic of Korea
- some regions of China
However, transmission of the virus remains unaffected by immunization, and non-immunized individuals remain at risk.
