Stratification of DF/DHF in SEAR
Category A - Indonesia, Myanmar, Thailand

• Epidemics have been caused by all 4 virus serotypes in the past 20 years.
• High morbidity among children.
• Cyclic epidemics (3-5 years) in urban centers and spreading to rural areas.
• Multiple virus serotypes circulating.
  

Category B - Bangladesh, India, Maldives, Sri Lanka

• DHF is an emergent disease.
• Cyclic epidemics are becoming more frequent.
• Multiple virus serotyupes circulating.
• Expanding geographically within countries.
  

Category C - Bhutan, Nepal

• No reported cases.
• Endemicity uncertain.
  

Category D - DPR Korea

• Non-epidemic.
  

Factors responsible for resurgence of the dengue epidemic

• Human population growth.
• Uncontrolled urbanization.
• Inadequate waste management and water supply.
• Increased densities of vector and lack of effective mosquito control.
• Increased movement and spread of dengue viruses.
  

DF/DHF is reportable disease in

• India (limieted areas, National Programme started in1999)
• Indonesia
• Maldives
• Myanmar
• Sri Lanka
• Thailand