Japanese Encephalitis is a mosquito-borne virus found in rural parts of Asia and the Pacific. It's rare in travellers but can be very serious, so it's advised for longer or rural trips.
Recommended for longer stays (a month or more) or repeated trips to rural and agricultural parts of Asia, especially during or after the rainy and rice-growing season, and for activities like cycling, camping or fieldwork.
Two doses, usually 28 days apart. An accelerated 7-day schedule is available for adults.
A booster is recommended after 1–2 years for anyone with continued risk.
Two injections into the upper arm — complete the course at least a week before travel.
The primary course protects for 1–2 years; a booster extends this.
Usually mild — headache, muscle aches or a sore arm.
Postpone if unwell, and tell us about severe allergies or if you're pregnant.
Although rare, JE can cause serious brain inflammation with a high risk of death or lasting neurological damage. There's no specific treatment, so prevention matters for higher-risk trips.
Everything you need to know about the japanese encephalitis vaccination.
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