This viral disease is spread from the bite of an infected mosquito and can cause swelling of the brain (encephalitis). Other symptoms can include headache, fever, and serious neurological problems like seizures. According to the CDC, 1 in 4 infections result in death. Because of the serious risk of long-term illness and death, consider protecting yourself with the Japanese encephalitis (JE) vaccine.
Mosquitos carry the disease and spread the infection to people. Other animals like birds and pigs can become infected resulting in a cycle of transmission that can be hard to interrupt. There are many types of mosquito diseases, and Japanese encephalitis is different from malaria and dengue fever.
Unlike the name implies, this mosquito disease occurs throughout Asia including India and the Western Pacific. More than 25 countries are known to have risk for Japanese encephalitis virus. Risk varies depending on the country and time of year. In some countries the disease risk is highest during specific months and in other countries JE spreads year-round.
Because the disease happens more often in rural areas, it’s important to know your travel plans and seek vaccination if you will be at risk. Additionally, staying longer than 30 days and frequent return trips to Asia mean there is a greater risk for mosquito bites. Travelers planning outdoor activities like hiking, camping, trekking, and photography are more likely to be infected. Keep in mind, even if you are staying in mostly urban areas the JE vaccine may still be recommended and it’s best to speak with a travel health specialist before your trip.
The Japanese encephalitis vaccine requires two doses, given 28 days apart and the injection is given in the muscle of the arm. For travelers aged 18 to 65 short on time before departure, a faster schedule is available. The vaccine is safe for children as young as two months and all adults. If travel plans take you back to Asia routinely, a third dose of JE vaccine can be given to provide longer-term protection. Additionally, many Asian countries include Japanese encephalitis in routine childhood vaccinations, highlighting the importance of getting vaccinated before travel.
Destination Health Travel Clinic keeps hard-to-find vaccines like the Japanese Encephalitis Vaccine available on-hand. It’s best to receive your vaccine several weeks before your departure so schedule your visit online at any of our Massachusetts locations; or call the office nearest you for an appointment.
Traveling to Asia and in need of other vaccinations? Read about common vaccine preventable diseases including hepatitis A vaccine, and hepatitis B vaccine, typhoid fever vaccine, and chikungunya vaccine. Keep in mind, many destinations in Asia also carry the risk of malaria and medication is available to prevention illness.