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How Japanese encephalitis can be prevented?

Page last updated 10 July 2018

There are two main methods for preventing infection with Japanese encephalitis: vaccination and avoiding mosquito bites.

The Australian Government recommends vaccination for people (older than 1 year) traveling for one month or longer to high-risk countries. This especially if travelling in the wet season, participating in any outdoor activities, or visiting rural areas. Vaccination should be completed at least 1-2 weeks before travelling. For further information regarding vaccination, speak with your healthcare professional.

Recommended ways to decrease the likelihood of mosquito bites include:

  • Wearing loose-fitting, long-sleeved shirts and long pants
  • Using high strength mosquito repellent on exposed skin and clothes
  • Being extra vigilant from dusk to dawn (peak mosquito biting hours for species which transmit Japanese encephalitis)
  • Removing or covering still water, e.g. water buckets
  • Ensuring windows and doors are closed or screened
  • Using a mosquito net over sleeping areas, and spraying it with mosquito repellent or insecticide.

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Sources & Citations

  1. NSW Government, Department of Health, Communicable Diseases Factsheet – Japanese Encephalitis. Available at; (accessed 28 March 2018).
  2. Centers for Disease Control and Prevention. Japanese Encephalitis. Available at: (accessed 28 March 2018).
  3. The Australian Immunisation Handbook 10th Edition. 4.8 Japanese Encephalitis. Available at (accessed 28 March 2018).
  4. Centers for Disease Control and Prevention. Japanese Encephalitis Geographic Distribution. Available at: (accessed 2 April 2018).

SPANZ.IMOJ.18.04.0141a - Date of preparation May 2018