Japanese encephalitis
You can reduce your risk of Japanese encephalitis by getting vaccinated and taking precautions to avoid mosquito bites in at-risk areas.
Vaccination againstJapanese encephalitisis recommended for anyone who may be at risk ofthe infectionthrough their work or travels. It provides protection for more than 9 out of every 10 people who have it.
Vaccination isparticularly important if:
If you're travelling to a country where Japanese encephalitis is found, visit your GP or practice nurse at least six to eight weeks before you leave, to discuss whether you should have the vaccination.
For more information about at-risk areas, read about the causes of Japanese encephalitis .
There's one vaccine for Japanese encephalitis currently licensed in the UK for use in adults and children over two months old.
The vaccination is given as an injection and requires two doses for full protection, with the second dose given 28 days after the first.
People from the ages of 18 to 65 may be given the vaccine on an accelerated schedule, where the second dose is given seven days after the first.
Eithercourse of vaccination should be completed at least seven days before potential exposure to the Japanese encephalitis virus.
TheJapanese encephalitisvaccineisn't usually available on the NHS and the cost can vary between clinics. Each dosecan cost more than 90 per person, soit's a good idea to include this when budgeting for your trip.
If you continue to be at risk of infection, a booster dose of the vaccine should be given 12 to 24 months after you're first vaccinated.
Up to 40% of people who have the Japanese encephalitis vaccine experience mild and short-lived side effects, such as:
More serious side effects such as a raised, itchy red rash ( urticaria or hives) , swelling of the face and difficulty breathing are rare.
If you develop any worrying symptoms after being vaccinated, contact your GP as soon as possible or call NHS 111 for advice.
Most people can have theJapanese encephalitis vaccination safely, but you should tell the doctor or nurse before being vaccinated if you have a high temperature (fever), or if you're pregnant or breastfeeding.
The vaccination may need to be postponed if you have a fever. It may also not be recommended if you're pregnant or breastfeeding, due to the theoretical risk of problems resulting from the vaccine being passed to your baby.
The Japanese encephalitis vaccine isn't normally recommended for children less than two months old, because it's unclear how safe and effective it is for this age group.
You shouldn't have the vaccine if you've had a severe allergic reaction (anaphylaxis) to it or any of its ingredientsin the past.
As the vaccination against Japanese encephalitis isn't 100% effective, you should protect yourself against mosquito bites while travelling or staying in at-risk areas by:
Various types of insect repellent are available. Many contain diethyltoluamide (DEET), but some are available that contain dimethyl phthalate or eucalyptus oil, if you're allergic to DEET.
When using insect repellent, make sure you:
If you or your children have a reaction to aninsect repellent, such as redness, stop using it. Wash it off and contact your GP, or a local healthcare professional if you're abroad.
Japanese encephalitis is a type of viral brain infection that's spread through mosquito bites.
Japanese encephalitis is caused by a flavivirus, which can affect both humans and animals. The virus is passed from animals to humans through the bite of an infected mosquito.
You can reduce your risk of Japanese encephalitis by getting vaccinated and taking precautions to avoid mosquito bites in at-risk areas.