JAPANESE ENCEPHALITIS VACCINE. SCOTTSDALE, AZ

Japanese Encephalitis Vaccine in Arizona

Japanese encephalitis is a serious mosquito-borne brain infection with no cure and a fatality rate up to 30 percent in severe cases. If you are heading to rural or agricultural Asia, the vaccine is your most important protection. Same-day appointments often available.

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96% effective . 2-dose primary series . As short as 14 days to full protection for adults

QUICK FACTS

Japanese Encephalitis (JE) is a viral infection transmitted by the bite of an infected mosquito that can lead to severe brain inflammation.

  • You may be at risk for this potentially deadly disease if you plan to live in or spend an extended period of time in endemic areas in Asia.
  • The Japanese Encephalitis vaccine provides effective immunity with a series of 2 shots.
  • Discuss with your travel health specialist whether the JE vaccine is appropriate for you.

Japanese Encephalitis: Rare but Often Devastating

Japanese encephalitis (JE) is a viral brain infection transmitted through the bite of infected Culex mosquitoes, primarily Culex tritaeniorhynchus. The virus circulates between mosquitoes, pigs, and wading birds in agricultural and rural areas across Asia and the western Pacific. Humans are incidental, dead-end hosts.

Most infections produce no symptoms or only a mild fever. But roughly 1 in 250 infections progresses to encephalitis. Of those who develop encephalitis, 20 to 30 percent die, and 30 to 50 percent of survivors are left with permanent neurologic or psychiatric disabilities, including cognitive impairment, seizure disorders, and movement problems. There is no specific antiviral treatment. Care is purely supportive.

Approximately 68,000 clinical cases are estimated each year across Asia. The disease is largely vaccine-preventable in local pediatric populations now, which means cases increasingly concentrate among unvaccinated travelers who enter risk areas without protection.

Who Should Consider the Japanese Encephalitis Vaccine

The CDC and ACIP recommend JE vaccination for travelers in any of the following situations:

  • Planning a trip of one month or longer to endemic areas in Asia or the western Pacific
  • Spending time in rural or agricultural settings regardless of trip duration, particularly near rice paddies, pig farms, or irrigation areas
  • Conducting field research, disaster relief, missionary work, or military operations in endemic areas
  • Making repeated short trips to endemic areas over time
  • Traveling with itineraries that involve rural overnight exposure in endemic regions

Medically Reviewed By

Norman J. Bizon, PA-C, CTH® is Medical Director at TravelBug Health. Over 30 years of clinical experience and certified in travel medicine and international health.

Tessa E. McFall, ASN, EMT is a Travel Health Specialist Clinician at TravelBug Health.

Last updated April 21, 2026

DESTINATIONS

Where Japanese Encephalitis Is a Risk

JE virus is endemic across a broad swath of Asia and the western Pacific. Risk is highest in rural agricultural regions and during transmission season, which varies by country. Always review your specific itinerary at your consultation.

Thailand. Risk exists throughout the country, with highest transmission in rural and agricultural areas in the north and northeast. Year-round transmission. The Chiang Mai region and Mekong corridor carry higher risk than Bangkok. Recommended for travelers spending time outside major urban centers.

Vietnam. Endemic throughout. Red River Delta and northern agricultural provinces are particularly high risk. Transmission peaks May to October in the north, year-round in the south. Rural homestays, cycling tours, and overnight outdoor travel increase exposure considerably.

Indonesia. Risk on Bali, Java, Lombok, and all major islands. Year-round transmission. Bali has documented cases in travelers due to its combination of rice paddies and popular rural tourism. Recommended for most itineraries involving rural overnight stays.

Cambodia and Laos. Endemic throughout both countries. Risk is elevated during rainy season (May to October) when mosquito populations peak. Rural temple circuits and Mekong river travel are higher-risk itineraries.

Myanmar. Endemic across rural areas. Agricultural regions of the Irrawaddy Delta and central dry zone carry significant risk. Transmission peaks during and after the monsoon season.

Philippines. Risk on most islands, year-round. Rural and island-hopping itineraries with overnight exposure in agricultural settings warrant vaccination.

Malaysia and Singapore. Risk in rural peninsular Malaysia and Sarawak. Urban Singapore carries very low risk. Travelers spending time in Malaysian Borneo agricultural or jungle regions should consider vaccination.

China. Widespread rural risk across central, eastern, and southwestern provinces. Transmission season July to September in temperate areas. Year-round risk in southern Yunnan, Hainan, and subtropical regions. Urban centers such as Beijing and Shanghai carry very low risk.

Japan. Risk is very low and largely limited to rural agricultural areas on the main islands, particularly western Honshu and Kyushu. Most short-term tourists to Tokyo, Kyoto, or Osaka face negligible risk. Consider vaccination for extended rural stays or visits to farming areas.

South Korea. Sporadic transmission in rural areas, primarily July to October. Risk is low for typical urban travel to Seoul. Agricultural rural stays during peak season warrant consideration.

India. Extensive rural risk across Uttar Pradesh, Bihar, West Bengal, Assam, Karnataka, Goa, and northeastern states. JE is endemic and regularly causes outbreaks. The Ganges plain, eastern India, and Kerala experience high annual case counts. Year-round risk in the south, seasonal June to October in the north.

Nepal. Endemic in the Terai lowlands and inner Terai valleys, including Chitwan. Risk is lower at high-altitude trekking destinations. Travelers combining Kathmandu with lowland wildlife parks (Chitwan, Bardia) should strongly consider vaccination.

Sri Lanka. Endemic in the northern plains and north-central provinces. Year-round risk with two seasonal peaks. Rural agricultural areas carry significantly higher risk than Colombo and the southern coastal resorts.

Bangladesh. Endemic. Rural areas and agricultural districts carry risk during peak transmission season. Outbreaks have been documented in recent years.

Papua New Guinea. Risk in rural lowland areas. Year-round transmission. Travelers doing field work, conservation research, or off-the-beaten-path trekking carry higher exposure.

Australia (Torres Strait and northern Queensland). JE virus was confirmed in mainland Australia in 2022, affecting northern Queensland, New South Wales, and Victoria. Risk is concentrated in the Torres Strait islands and northern Queensland, particularly in agricultural areas near pig farming.

Pakistan. Sporadic transmission documented. Risk concentrated in agricultural and irrigated districts. Vaccination generally considered for travelers with significant rural exposure.

Transmission seasons and risk zones shift with rainfall, land use, and local conditions. We review current CDC and WHO guidance for your specific itinerary at your appointment.

VACCINE RECORDS

Tracking Your JE Vaccination Series

Unlike yellow fever, Japanese encephalitis vaccination is not required for entry into any country, and there is no international documentation card equivalent to the ICVP. However, keeping a clear vaccination record is important for practical reasons specific to a multi-dose regimen.

Bring your vaccination record to your second appointment and to any future travel medicine consultations. If you lose your records, we can reissue documentation from our patient file.

SAFETY

Who Should Not Get the Japanese Encephalitis Vaccine

The JE vaccine available in the United States (Ixiaro) is an inactivated vaccine. Contraindications are fewer than with live-virus vaccines but still require careful review before vaccination.

Contraindications and Precautions

You should not receive Ixiaro, or should discuss carefully before receiving it, if you:

  • Have had a severe allergic reaction (anaphylaxis) to a previous dose of Ixiaro or to any component of the vaccine, including protamine sulfate
  • Are under 2 months of age (the vaccine is approved from 2 months onward)
  • Are pregnant (the vaccine should be used only if the benefit clearly outweighs the risk; limited safety data are available)
  • Are breastfeeding (safety data are limited; discuss with your provider)
  • Are moderately or severely ill at the time of vaccination (defer until recovery)

Immunocompromised Travelers

Because Ixiaro is an inactivated (killed) vaccine, it is not contraindicated in immunocompromised individuals the way live vaccines are. However, immunocompromised travelers may develop a reduced immune response, potentially requiring additional doses or closer post-vaccination review.

Immunocompromised travelers also face more severe outcomes from JE itself, which often shifts the risk-benefit analysis decisively toward vaccination. Bring a complete medication list including any biologics, chemotherapy agents, or systemic steroids.

Call to Discuss Your Case

SPECIAL CONSIDERATIONS

Specific Situations We Handle

Last-Minute Travel

For adults, the 2-dose series is given on days 0 and 7, with travel beginning no sooner than 7 days after dose 2. That is a minimum ~14-day window. Children continue to follow the days 0 and 28 schedule, with at least 7 days after dose 2 before travel. If departure is imminent, we discuss the risk honestly. Partial protection combined with aggressive mosquito bite prevention may be the practical approach.

Pregnancy and Breastfeeding

Safety data for Ixiaro in pregnancy are limited. The vaccine is not a live virus, which removes the theoretical fetal infection concern, but the benefit-risk balance should be reviewed carefully. If travel to a high-risk area is unavoidable, vaccination may be the right call. We review each case individually.

Children and Infants

Ixiaro is approved for children aged 2 months and older. Children 2 months to under 3 years receive a half-dose formulation. Children 3 years and older receive the standard adult-volume dose. The 28-day interval between doses applies for pediatric patients; the accelerated 7-day adult schedule is FDA-approved only for ages 18 to 65. Bring vaccination records for all children traveling with you.

Frequent Asia Travelers

Long-term travelers, expats, and those making repeated short trips to endemic areas should receive the booster dose at one year after the primary series. After that first booster, ongoing need is reassessed based on continued exposure. We track your vaccination history and alert you when a booster is due.

Immunosuppressive Medications

Patients on biologics, DMARDs, systemic corticosteroids, or other immunosuppressants can receive Ixiaro because it is inactivated. Immune response may be reduced, and additional doses are sometimes warranted. Bring a full medication list so we can assess timing and discuss expectations for immunity levels.

Coordinating the Full Pre-Travel Panel

Most Asia-bound travelers need more than just JE vaccine. We coordinate hepatitis A, typhoid, hepatitis B, rabies pre-exposure prophylaxis, and malaria medications in a single appointment, sequencing vaccines appropriately and giving you one itemized receipt.

EFFECTIVENESS

Two Doses. Strong Protection.

Ixiaro, the inactivated Vero cell-derived JE vaccine used in the United States, has demonstrated seroprotection rates of up to 96 percent in clinical trials following the 2-dose primary series. Seroprotection is defined as a virus neutralization titer of 1:10 or higher, which correlates with protection against clinical disease.

For adults, the primary series is 2 doses given 7 days apart. Travel should begin no sooner than 7 days after the second dose, so plan a minimum ~14-day window. Children follow the longer schedule of 2 doses 28 days apart, with at least 7 days after dose 2 before travel (a 35-day window).

A booster dose is recommended at 1 year if ongoing risk is anticipated. After the booster, available data support continued protection for at least 2 years. Long-term durability data beyond that are still being collected.

Ixiaro replaced the older mouse-brain-derived JE vaccine in the United States. The newer formulation carries a significantly improved safety profile with the same strong efficacy.

96%

Seroprotection
After 2-dose series

2

Doses
Adults: days 0 and 7. Children: days 0 and 28

As short as 14 days to full protection for adults 18 to 65

Adults: 7-day dosing interval plus 7 days after dose 2 before travel. Children: 28-day interval plus 7 days.

COST AND INSURANCE

What to Expect at Checkout

Travel vaccines are generally not covered by commercial health insurance, Medicare, or Medicaid because they are considered elective rather than medically necessary. That pattern is industry-wide.

At Your Appointment

You will be charged for:

  • Travel health consultation (itinerary-based risk assessment)
  • Ixiaro (JE vaccine), per dose
  • Administration fee
  • Any other vaccines or prescriptions you elect at the same visit

Pricing varies based on services. Call (480) 435-2774 for current pricing. We are transparent so there are no surprises.

What to Ask Your Insurer

Before your appointment, call the member services number on your insurance card and ask:

  • Does my plan cover travel vaccines, including Japanese encephalitis?
  • What CPT code do I submit? JE vaccine is typically 90738
  • Do I need pre-authorization?
  • Can I apply HSA or FSA funds?

For Reimbursement

After your appointment, we provide a detailed itemized receipt with:

  • CPT codes
  • Diagnosis codes
  • Clinician’s NPI
  • Itemized line items

Reimbursement outcome is between you and your insurer.

SAFETY PROFILE

Side Effects and Safety

Ixiaro replaced the older mouse-brain-derived JE vaccine partly because of its improved safety profile. Clinical trial data and post-marketing surveillance show it to be well-tolerated in the vast majority of recipients.

COMMON. 10 to 30%

Mild and Self-Limited

  • Pain, tenderness, redness, or swelling at the injection site (1 to 3 days)
  • Headache (most commonly reported systemic reaction)
  • Myalgia (muscle aches)
  • Low-grade fever and fatigue
  • Nausea

LESS COMMON. Under 10%

Mild Systemic Reactions

A small proportion of recipients report flu-like symptoms lasting 1 to 3 days, including chills, mild joint aches, or gastrointestinal discomfort. These reactions are self-limiting and do not require treatment beyond rest, fluids, and acetaminophen if needed.

RARE

Allergic Reactions

Severe allergic reactions (anaphylaxis) are rare. We observe all vaccinated patients for at least 15 minutes post-injection. Individuals with a history of reaction to protamine sulfate, used in certain cardiac procedures or insulin formulations, should disclose this before vaccination, as protamine is present in Ixiaro.

No neurotropic adverse events of the type seen with the older mouse-brain-derived vaccine have been associated with Ixiaro in clinical trials or post-marketing surveillance. This is a meaningful safety improvement over prior-generation JE vaccines previously available in the United States.

WHAT HAPPENS NEXT

After Your Japanese Encephalitis Vaccination

1

Plan the Two-Dose Window

Adults aged 18 to 65 need 7 days between dose 1 and dose 2, plus 7 more days before travel begins, so 14 days at a minimum. Children and adults outside that age range need 28 days between doses plus 7 more days, so 35 days at a minimum. We schedule both doses at your initial appointment so nothing is left to chance.

2

Expect Mild Symptoms

Soreness at the injection site and a mild headache or fatigue in the 24 to 48 hours following each dose is normal. Acetaminophen or ibuprofen can help. Contact us if symptoms are severe or last longer than 3 days.

3

Vaccine Is Not Your Only Protection

JE vaccine is highly effective but not 100 percent. Continue using DEET-based repellents, permethrin-treated clothing, and sleeping in screened or air-conditioned rooms. Culex mosquitoes bite predominantly from dusk to dawn, so evening protection is especially important.

4

Plan for the Booster

If you expect to return to endemic areas or travel frequently to Asia, a booster is recommended at 1 year after the primary series. Note the date at your second appointment. We keep records and can remind you when it is due.

WHY A TRAVEL CLINIC

TravelBug vs. Primary Care or Pharmacy

Japanese encephalitis vaccine requires specialized knowledge of risk geography, travel patterns, and vaccine scheduling. Here is how a dedicated travel clinic compares to the alternatives.

TravelBug Health

  • Stocks Ixiaro (JE vaccine) in clinic
  • Specialist-led itinerary-based JE risk assessment
  • Schedules both doses at your initial appointment
  • Same-day or next-day appointments often available
  • Coordinates full Asia pre-travel vaccine panel
  • Booster tracking and reminders for ongoing travelers

PCP or Retail Pharmacy

  • Rarely stocks Ixiaro; often must order and reschedule
  • Limited or general travel risk consultation only
  • Variable dose scheduling coordination
  • Variable scheduling availability
  • Limited stock of travel-specific vaccines
  • Generally no booster tracking or reminders

SCHEDULE YOUR VACCINATION

TravelBug Health in Scottsdale

We are a dedicated travel medicine clinic in the heart of the Phoenix metro. We see Asia-bound travelers from across the Valley and northern Arizona, and we carry Ixiaro in stock. No referral required, no waiting for a primary care office to order a specialty vaccine.

TravelBug Health Travel Clinic
8603 E Royal Palm Rd, Suite 120
Scottsdale, AZ 85258

Phone: (480) 435-2774
Email: team@travelbughealth.com
Hours: Monday to Friday, 9:00 AM to 5:00 PM (by appointment)

Call Now Book Online

Just minutes from across the Valley

North Scottsdale near the 101 and Shea Blvd:

No referral required. Same-day and next-day appointments are often available. The earlier you call, the more scheduling flexibility you have for the 2-dose series.

QUESTIONS TRAVELERS ASK

Frequently Asked Questions

For adults aged 18 to 65, the FDA-approved accelerated schedule is 2 doses of Ixiaro given 7 days apart. The second dose should be completed at least 7 days before travel, so a minimum lead time of 14 days. For children and adults outside that age range, the schedule is 2 doses given 28 days apart, with a minimum lead time of 35 days. A booster dose is recommended at 1 year for travelers with continued or anticipated ongoing exposure to endemic areas.

Pricing varies based on your consultation and services. Call (480) 435-2774 for current per-dose pricing before your appointment. Keep in mind the primary series requires two doses. We provide detailed itemized receipts for HSA, FSA, and insurance reimbursement submissions.

Most commercial health insurance plans, Medicare, and Medicaid do not cover travel vaccines including Japanese encephalitis. Some plans offer partial reimbursement with the appropriate CPT and diagnosis codes. HSA and FSA funds can generally be applied. We provide all documentation needed to file a claim.

The CDC recommends the JE vaccine for travelers to Thailand who plan to spend time in rural or agricultural areas, or who will be in the country for one month or longer. Short-term travelers staying exclusively in major urban hotels in Bangkok with no rural exposure have a much lower risk profile. Any itinerary involving rural overnight stays, especially in the north or northeast, warrants vaccination. We review your specific plan at your consultation.

Yes, the CDC recommends considering JE vaccination for travelers to Bali, particularly those staying in rural or agricultural areas, participating in outdoor activities at dusk or dawn, or spending a month or more on the island. Bali has documented JE cases in travelers due to its combination of rice paddies, pig farming, and outdoor tourism. Many Bali itineraries include significant rural exposure that is easy to underestimate.

The CDC recommends JE vaccination for travelers to Vietnam who spend time in rural areas, plan to be in the country for one month or more, or whose itinerary includes agricultural regions, cycling tours, or rural homestays. Risk is higher in the Red River Delta and northern provinces, with a transmission peak from May to October in the north. Year-round risk exists in the south.

Risk of JE in Japan is very low for most tourists. The disease is largely controlled through a national vaccination program. Short-term travel to Tokyo, Kyoto, Osaka, and other urban centers carries negligible risk. Vaccination is considered for travelers making extended stays in rural agricultural areas of western Honshu or Kyushu, or those living or working in rural Japan for a prolonged period.

The JE vaccine available in the United States is Ixiaro, an inactivated Vero cell-derived vaccine. It replaced the older mouse-brain-derived vaccine (JE-VAX), which is no longer available. Ixiaro has a significantly improved safety profile compared to the older formulation.

The primary 2-dose series provides protection estimated to last at least 1 year in most recipients. A booster dose given 1 year after the primary series extends protection for at least an additional 2 years based on available data. Long-term durability beyond that is still being studied. Travelers with ongoing or anticipated future exposure should plan for periodic boosters in consultation with their travel medicine provider.

Ixiaro is an inactivated vaccine, so there is no theoretical risk of fetal infection from the vaccine itself. However, safety data in pregnant women are limited. The CDC advises that the vaccine should be used during pregnancy only when the potential benefit clearly outweighs the risk. If you are pregnant and planning travel to a high-risk rural area in Asia, we can help you weigh the decision based on your specific itinerary and health history.

Yes. Ixiaro is approved for children aged 2 months and older. Children aged 2 months to under 3 years receive a half-dose (0.25 mL) formulation. Children 3 years and older receive the standard adult-volume dose (0.5 mL). The 28-day interval between doses applies for pediatric patients; the accelerated 7-day adult schedule is FDA-approved only for ages 18 to 65. Bring vaccination records for all children.

The most common side effects are pain or tenderness at the injection site, headache, myalgia (muscle aches), and mild fatigue. These typically resolve within 1 to 3 days. Severe allergic reactions are rare. We observe all patients for at least 15 minutes after injection. Importantly, Ixiaro does not carry the neurotropic adverse event risk associated with older mouse-brain-derived JE vaccines.

For adults aged 18 to 65, at a minimum 14 days before departure: 7 days between doses plus 7 days for immunity to develop after the second dose. For children and adults outside that age range, plan a minimum of 35 days (28 days between doses plus 7 days post-dose-2). Ideally, start 4 to 8 weeks before travel so we can also address any other recommended vaccines, malaria prophylaxis, and travel medications without rushing. Call as soon as your trip is planned.

Yes. Ixiaro can be given concurrently with most other travel vaccines, including hepatitis A, hepatitis B, typhoid, and yellow fever. We coordinate the full pre-travel vaccine panel at your appointment and sequence them appropriately. A single visit is often sufficient to administer multiple vaccines.

No country currently requires proof of JE vaccination as a condition of entry. JE vaccination is recommended based on your travel itinerary and activities, not mandated at immigration. The decision is driven entirely by personal health protection, not border documentation requirements.

TravelBug Health carries Ixiaro in stock at our Scottsdale clinic. We serve the entire Phoenix metro, including Tempe, Mesa, Gilbert, Paradise Valley, and Peoria. Call (480) 435-2774 to schedule. Same-day appointments are often available.

Ready to Travel With Confidence?

Schedule Your Japanese Encephalitis Vaccination

No referral required. Same-day and next-day appointments often available. We handle the risk assessment, the vaccine, and the scheduling of both doses. All in one place.

Call (480) 435-2774 Book Online