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Japanese Encephalitis

About Japanese Encephalitis

Japanese Encephalitis is a serious but rare viral brain infection spread through mosquito bites in parts of Asia and the Pacific Rim.  The Japanese Encephalitis vaccine is not available on the NHS.

Symptoms of Japanese Encephalitis

These can be flu-like, or more severe symptoms of –

  • Fever
  • Seizures
  • Inability to speak
  • Shaking
  • Confusion
  • Muscle weakness or paralysis
  • Stiff neck


Reduce your risk of contracting Japanese Encephalitis by being vaccinated and taking precautions to avoid mosquito bites.

  • Wear long-sleeves tops, trousers and socks
  • Wear loose-fitting clothes, as mosquitoes can bite through skin-tight clothing
  • Use insect repellent
  • Spray rooms with insecticide
  • Use mosquito nets in bedrooms, preferably impregnated with an insecticide
  • Sleep in bedrooms with close-fitting gauze over the windows and doors, if possible

The vaccine provides protection for more than 9 out of every ten people who have it. 

Japanese Encephalitis vaccinations

The Japanese Encephalitis vaccine is for adults and children aged 2 months and older. You will need 2 does for full protection. The second dose is given 28 days after the first. Adults aged 18 to 64 may be given the second dose 7 days after the first. This is called an accelerated schedule.

Both doses should be administered at least 7 days before visiting an area where there is a risk of Japanese Encephalitis.

Book your private Japanese Encephalitis vaccinations here.