Japanese Encephalitis

Japanese Encephalitis Vaccinations Across Nottingham, Leicester, Derby and Mansfield

Japanese Encephalitis – what you need to know:

Japanese encephalitis is a viral infection spread by mosquitoes. It causes swelling of the brain which results in permanent brain damage or death. According to the World Health Organization, at least 50,000 people in Asia develop visible symptoms each year.

Most people infected by the Japanese encephalitis virus do not develop any symptoms, or they get only mild, flu-like symptoms. However, around one person in 250 infected by the virus has serious and severe symptoms. The symptoms for Japanese Encephalitis are as follows:

  • vomiting,
  • seizures,
  • headache and mental confusion.

We would strongly recommend those at risk to get vaccinated prior to travelling to the risk areas.

Remember, while travelling, be sure to use mosquito nets and avoid insect bites between dusk and dawn – when the mosquitos are most active.

Injections are recommended for travellers considering outdoor activities in high-risk areas. The immunization against Japanese Encephalitis requires a course of two vaccines over 28 days.

Where are the risk areas?

Areas of risk include:

  • the Indian sub-continent,
  • Asia,
  • and remote parts of North-East Australia.

How old to you have to be to have the vaccine?

The vaccine can be given to those aged 2 months and over.

How long does immunity last for?

Immunity lasts for 3 years.


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Patient information leaflet on: http://www.medicines.org.uk/emc/PIL.21676.latest.pdf