Japanese Encephalitis Vaccine Singapore
Plan Your Protection Before Rural Travel
Conveniently located in Orchard, Tanjong Pagar, Jurong East & Novena
Medically Reviewed By: Dr Jana Lim, Board-Accredited Family Physician
Board-Accredited Family Physician | MBChB, MMed (FM)
MBChB, MMed (FM) | Last updated:
What Is Japanese Encephalitis?
Japanese encephalitis (JE) is a viral infection spread through mosquito bites that can cause inflammation of the brain.
The virus belongs to a group called flaviviruses, which are spread mainly by mosquitoes and ticks. JE is regularly found across parts of Asia, including Southeast Asia, and has also been reported in other regions.
Japanese Encephalitis Symptoms
In the majority of cases, individuals infected with JE do not exhibit symptoms. When symptoms develop, they
can be severe and may include fever, headaches, nausea, seizures, and confusion.
These signs typically emerge in about 1 in 250 infected individuals. Around 30%
to
50% of those who survive may suffer from long-term neurological issues such as vision or
hearing impairment,
speech difficulties, memory loss, seizures, or weakness in the limbs.
In more serious cases, the illness may progress to coma or even result in death.
Japanese Encephalitis Prevention
Minimising exposure to mosquitoes is key to preventing JE. Some practical tips include:
- Wearing long-sleeved, permethrin-treated clothing
- Applying insect repellent to exposed skin
- Using mosquito nets, particularly during evening and nighttime hours
For those travelling to or living in areas where JE is common, vaccination is the most reliable preventive measure.
Who Is the Japanese Encephalitis Vaccine Recommended for?
Vaccination is generally advised for the following groups:
- Residents of Endemic Regions — Individuals planning to reside in areas where JE is common.
- Long-Term Travellers — People staying for a month or longer in regions where JE is prevalent, or those with repeated exposure.
- Short-Term Travellers with Elevated Risk — Individuals visiting for less than a month but with risk factors such as rural travel, outdoor activities, or peak transmission season.
- Travellers with Uncertain Plans — Those visiting areas where JE is endemic but have unclear travel routes, durations, or activities.
Who Should NOT Receive the Vaccine?
The JE vaccine may not be suitable for:
- Individuals with Severe Allergies — Those who have had serious allergic reactions to previous JE vaccines (e.g. Ixiaro®) or to any vaccine components, including protamine sulphate.
- Pregnant Individuals — As a general precaution, JE vaccination is not routinely recommended during pregnancy unless the benefits clearly outweigh potential risks, such as when travel to high-risk areas is unavoidable.
If you're unsure about your suitability for vaccination, seek guidance from a doctor.
Japanese Encephalitis Vaccine Route of Administration
The vaccine is administered via an intramuscular injection, typically into the upper arm.
Japanese Encephalitis Vaccine Dose & Schedule
For individuals who have not previously been vaccinated, a single dose of the Imojev
vaccine is
generally sufficient.
It is recommended to receive the vaccine at least 30 days before travelling to a
region where Japanese encephalitis is endemic.
How Long Does the Japanese Encephalitis Vaccine Last?
One dose of the Imojev vaccine generally provides long-term protection that lasts for more than 10 years. However, if there is ongoing risk beyond one year, your doctor may recommend a booster dose.
What Precautions Should I Take Prior to a Japanese Encephalitis Immunisation?
Before receiving the vaccine, inform your doctor if you:
- Have allergies to vaccine components or experienced previous adverse reactions
- Are currently pregnant or breastfeeding
- Have a weakened immune system or are undergoing treatments like chemotherapy or prolonged high-dose steroid use
Japanese Encephalitis Vaccine Side Effects
Most side effects of the JE vaccine are mild and temporary. Common reactions include:
- Pain or redness at the injection site
- Dizziness or fatigue
- Low-grade fever
- Headaches
- Flu-like symptoms
If side effects persist or worsen, it is advisable to consult your doctor.
Rare But Serious Reactions to Watch For
Although uncommon, some individuals may experience severe allergic responses. Symptoms to look out for include:
- Swelling of the face or eyes
- Difficulty breathing
- Generalised itchy rash
Seek immediate medical attention if any of these signs occur after vaccination.
Disclaimer: This overview does not cover all possible side effects or medical considerations. Always consult a qualified healthcare professional for medical advice before receiving any vaccination.
Japanese Encephalitis Vaccine Cost in Singapore
At Singapore Women's Clinic, we offer the Japanese encephalitis vaccine (Imojev), with prices as follows:
| Vaccine | Price* |
|---|---|
| Japanese Encephalitis (Imojev) Vaccine | $325 / dose |
| Influenza (Flu) Vaccine | $38.15 / dose (Subsidies available) |
| Travel Medicines | |
| Malaria Pills (Doxycycline / Malarone) | From $1.09 / tab |
| Period Delay Pill (Norethisterone 5 mg) | $0.76 / tab |
*Prices are NETT and inclusive of GST.
Payment Options We Accept
Why Choose Our Vaccination Services?
Same-Day Appointments
Book in the morning and have your vaccination the same day, at any of our clinics.
One-Stop Clinic
Get several vaccines in one visit, so you are not making a separate trip for each one.
Proof of Vaccination
Receive official documentation at no extra cost, for travel, school or work.
