Do I need the Japanese encephalitis vaccine for my trip?
It depends on where you're going, for how long, and what you'll be doing. Vaccination is recommended if you're living in or relocating to an endemic area, staying a month or more, or travelling to rural or agricultural areas — particularly during the transmission season. Short city trips generally don't require it. Our doctors will assess your itinerary.
Which Japanese encephalitis vaccine do you provide?
We provide IMOJEV, a live, weakened vaccine given as a single dose. An inactivated (non-live) Japanese encephalitis vaccine also exists and is available elsewhere in Singapore, but we do not carry it. If a non-live vaccine is the safer choice for you — for example in pregnancy or with weakened immunity — our doctors will tell you and advise where to go.
How many doses of the Japanese encephalitis vaccine do I need?
One. IMOJEV is given as a single dose. A booster may be advised later if you remain at ongoing risk — for example if you live in or repeatedly travel to an endemic area.
How far ahead should I get vaccinated?
Come and see us four to six weeks before you fly. IMOJEV is a single dose, but giving it well ahead of departure allows protection to develop and leaves room for your other travel vaccines in the same visit.
Is Japanese encephalitis common in Singapore?
No. Singapore is not a risk area. Japanese encephalitis is found across rural parts of South, East and Southeast Asia and the Western Pacific, particularly where rice cultivation and pig farming are common. It is endemic in around 24 countries.
How serious is Japanese encephalitis?
Most infections cause no symptoms — only about one in 250 infected people become ill. But among those who do develop encephalitis, up to 30% die, and 30 to 50% of survivors are left with permanent neurological damage. There is no specific antiviral treatment; care is supportive only.
Do I still need mosquito precautions after vaccination?
Yes. The vaccine protects against Japanese encephalitis, but the same mosquitoes and their relatives spread dengue, chikungunya and other diseases with no vaccine. Repellent, covered clothing and a treated bed net remain essential.
What are the side effects of the Japanese encephalitis vaccine?
Most people have only mild reactions: pain or tenderness at the injection site, headache, muscle aches or a low-grade fever. These typically settle within a few days. Severe allergic reactions are rare.
Who should not have the Japanese encephalitis vaccine?
IMOJEV is a live vaccine, so it is avoided in pregnancy and in people with weakened immunity — whether from illness or from medicines such as steroids or chemotherapy. It is also avoided in anyone who has had a severe allergic reaction to a previous dose or to a vaccine component, and is postponed if you are unwell or feverish. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding, so we can advise you properly.
Can children have the Japanese encephalitis vaccine?
Yes, above a minimum age. Tell us your child's age and travel plans and our doctors will advise whether vaccination is appropriate.
Do I need a booster?
Possibly, if you remain at ongoing risk — for example, if you live in or repeatedly travel to an endemic area. Your doctor will advise on timing.
Is the Japanese encephalitis vaccine subsidised in Singapore?
No. It is a travel vaccine and is self-funded — not covered by CHAS, Healthier SG or other national subsidy schemes. It is also one of the more expensive travel vaccines, so ask us for the full course price.
Can I have it with other travel vaccines?
Yes. It can usually be given alongside other travel vaccines, and we can discuss malaria tablets in the same consultation — Japanese encephalitis destinations often carry malaria risk too.
