Dengue fever in Asian countries

The following countries are reporting on-going transmission of dengue fever virus:

Sri Lanka - The cities of Colombo, Kolonnawa, Kaduwela, Dehiwala, and Mount Lavinia are the most affected.


  • Sindh - Affected cities include Karachi, Hyderabad, Sukkur; many other cities report sporadic cases.
  • Khyber Pakhtunkhwa - sporadic cases


  • Negros Occidental - The most affected municipalities include Silay City, San Carlos City, and Himamaylan City.
  • Zamboanga - more cases than last year

Vietnam - almost triple the number of cases compared to last year.

Singapore - although slight decrease in reported cases, hundreds of people are diagnosed with this infection every week.

Visit our Health Library for more information on exposure to and the prevention of Dengue Fever.

Advice For Travellers

The absence of reports from other areas does not mean that there is no dengue fever transmission there. The risk of exposure will vary from place to place and may be high in many localities.

All travellers to areas where the dengue fever virus is active can reduce their risk of exposure by taking all necessary precautions to avoid mosquito bites. Many persons with dengue fever do not seek medical care and are not reported to health authorities. There may be many more cases in the community than the reports indicate.