Australia
Outer Torres Strait Islands, Tiwi Islands, and widespread parts of mainland Australia
November–May
Most travelers are at very low risk as no cases have been reported from major urban areas or main tourist areas.
Vaccination is recommended for longer-term (e.g., one month or more) travel to key risk areas of Outer Torres Strait Islands and Murray Valley region of New South Wales, Victoria, and South Australia.
Bangladesh
Widespread
Year-round
Most cases reported June–November
Disease incidence is greatest in northwest Bangladesh.
Bhutan
Presumed widespread in non-mountainous areas
Unknown
Risk is likely greatest in southern districts that share similar ecologic conditions with bordering JE-endemic states of India.
Brunei Darussalam
Presumed widespread
Unknown
Limited data are available, but an outbreak was reported in 2013.
Proximity of Brunei Darussalam to Sarawak, Malaysia, suggests ongoing transmission is likely in some areas.
Burma (Myanmar)
Widespread
Year-round
Most cases reported May–September
Cambodia
Widespread
Year-round
Peak season May–October
China
All provinces except Qinghai
Southern China in April–October and in northern China in May–September
Vaccination is not routinely recommended for travelers to major cities or Hong Kong.
India
Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Nagaland, Odisha, Punjab, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal
Peak season May–November, especially in northern India; season can be extended or year-round in some areas, especially in southern India.
Indonesia
Widespread
Year-round
Peak season varies by island.
Cases have been reported from many islands, including Bali, Java, Kalimantan, Lombok, Papua, Sulawesi, Sumatra, West Timor. Transmission is likely on all islands. Several cases have been reported among travelers to Bali in recent years.
Japan
All islands
June–October
Rare sporadic cases have been reported from all islands except Hokkaido. Vaccine is not routinely recommended for travelers to major cities.
Laos
Widespread
Year-round
Peak season June–September
Malaysia
Widespread
Year-round
Peak season in Sarawak is October–December
Much higher rates of disease have been reported from Sarawak than peninsular Malaysia.
Nepal
Southern lowlands (Terai), some hill and mountain districts
Peak season June–October
Highest rates of disease have been reported from southern lowlands (Terai). Vaccine is not routinely recommended for people trekking in high-elevation areas.
North Korea
Presumed widespread
Unknown
Proximity to South Korea suggests peak transmission May–November
Pakistan
Unknown
Unknown
Very limited data are available.
Previous case report and serosurvey data suggest transmission is possible at least in Sindh Province.
Papua New Guinea
Widespread
Presumed year-round
Philippines
Widespread
Year-round
Peak season July–October
Russia
Primorsky Krai
June–September
No recent cases have been reported.
Vaccine is not routinely recommended.
Singapore
Presumed in very focal areas
Year-round
Vaccine is not routinely recommended.
South Korea
Widespread
May–November
Sri Lanka
Widespread, except in mountainous areas
Year-round
Peak season November–February
Taiwan
Widespread
Peak season May–October
Thailand
Widespread
Year-round
Peak season May–October, especially northern Thailand
Highest rates of disease are reported from Chiang Mai Valley.
Several cases have been reported among travelers to resort and coastal areas of southern Thailand in recent years.
Timor-Leste
Presumed widespread
No data
Proximity to West Timor suggests year-round transmission
Vietnam
Widespread
Year-round
Peak season May–October, especially northern Vietnam
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