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Japanese Encephalitis (JE) is a serious viral infection caused by the Japanese encephalitis virus (JEV). This virus primarily affects the brain, leading to inflammation and potentially life-threatening complications. While many people infected with JEV do not show symptoms, those who do can experience severe neurological issues. JE is most commonly found in rural, peri-urban and agricultural areas, where it is spread by infected mosquitoes. The virus is transmitted primarily through mosquito bites, with these mosquitoes being most active during dusk and dawn. Humans can become infected when bitten by a mosquito that has fed on an infected animal, but human-to-human transmission does not occur.

What is Japanese Encephalitis?

The Prevalence of Japanese Encephalitis in Thailand

Thailand, particularly in the northern regions, is recognized as an area where JE is prevalent. With a large portion of the population living in rural or semi-rural areas, there is a higher risk of exposure to the virus, especially during the rainy season when mosquito populations are at their peak. Travelers to these regions, especially those planning extended stays at least 1 month, are advised to take precautions, including vaccination, to protect against JE.

What are the Symptoms of Japanese Encephalitis?

While most JE infections are asymptomatic, when symptoms do occur, they can be severe. Initial symptoms include fever, headache, vomiting, and confusion, which can rapidly progress to more serious neurological symptoms such as seizures, paralysis, and even coma. The mortality rate is about 20-30% of symptomatic cases, and up to 50% of survivors may suffer from long-term neurological complications. Early diagnosis and treatment are crucial, though prevention through vaccination remains the most effective defence.

Who Needs the Japanese Encephalitis Vaccine?

The Japanese Encephalitis vaccine is recommended for:

Travelers to Thailand: Especially those visiting Chiang Mai or rural areas where Japanese Encephalitis is more common.
Travelers to Southeast Asia: Those planning extended stays or traveling to rural and agricultural regions where the virus is prevalent.
Long-Term Residents: Individuals living in or frequently traveling to high-risk areas, especially for extended durations of travel, should consider vaccination.

Where to Get Japanese Encephalitis Vaccine in Chiang Mai, Thailand?

For reliable JE vaccine in Chiang Mai, please reach out to the Travel Clinic at Chiang Mai Wellness Clinic. Our clinic stands out as having the only specialized travel medicine doctor in northern Thailand, providing expert care and personalized travel health advice. Whether you’re a traveler, an expatriate, or a resident, we offer comprehensive travel medicine services, ensuring you have all the necessary vaccinations and health information before your trip.

How many Japanese Encephalitis vaccines do I need?

The Japanese Encephalitis vaccine typically requires a series of doses to ensure effective protection. The recommended schedule depends on your age, health status, and the specific vaccine used. Here is a general guideline:

For Certain Vaccines:

Imojev® (live attenuated vaccine): A series of two doses may be recommended, with doses given at 0 and 12-24 months. One shot of Imojev could provide up to 5 years protection against JE
Ixiaro® (inactivated vaccine)- not available in Thailand: Three doses are required, with the second dose given 7-28 day after the first, and the third dose given 1 years after the second does.

Booster Doses:

If you continue to live in or travel to areas where Japanese Encephalitis is common, booster doses may be needed.
Always consult with a doctor for the most appropriate vaccination schedule based on your individual needs and circumstances.

How effective is the Japanese Encephalitis vaccine?

The Japanese Encephalitis vaccine is highly effective in preventing the disease. Here’s a breakdown of vaccine effectiveness:

Protection Rate: The vaccine provides strong protection, with effectiveness rates of 90-95% or higher in preventing JE in people who receive the full vaccination series.
Duration of Immunity: Immunity from the vaccine generally lasts for several years. For those at ongoing risk, booster doses are recommended every 1 to 2 years to maintain high levels of protection.
Safety: The vaccine is considered safe with a low incidence of serious side effects. Common side effects are usually mild and may include soreness at the injection site or a low-grade fever.

What Are the Side Effects of the Japanese Encephalitis Vaccine?

The Japanese Encephalitis vaccine is generally safe and well-tolerated. Common side effects are usually mild and may include:

Injection Site Reactions: Pain, redness, or swelling at the site of the injection.
Fever: A low-grade fever may occur shortly after vaccination.
Headache: Some individuals might experience a mild headache.
Fatigue: Feeling tired or slightly unwell for a short period.

Serious side effects are rare but can include severe allergic reactions.

Overall, the benefits of vaccination in preventing JE far outweigh the risks of these mild and manageable side effects.

Why Get the Japanese Encephalitis Vaccine at Chiang Mai Wellness Clinic?

Expert Care: Chiang Mai Wellness Clinic is staffed with a specialized travel medicine doctor, ensuring you receive the highest level of care and personalized travel advice tailored to your needs.
Affordable Vaccines and Services: We offer competitive pricing on all our vaccines and services, making high-quality healthcare accessible to everyone.
Professional English-Speaking Staff: Our travel health professional team is supportive and knowledgeable.
Comprehensive Travel Health Services: In addition to the Japanese Encephalitis vaccine and vaccines for travelers, we offer a full range of travel medicine services, including travel consultations, medical certificates, and other essential vaccinations.
Convenient Location: Our travel clinic is located in the heart of Chiang Mai, our clinic is easily accessible, making it a convenient choice for both locals and travelers.
Trusted by Travelers: Our travel clinic is known for its reliable and professional services, making it a top choice for those seeking rabies vaccination and travel health advice in northern Thailand.

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