• Sporadic cases (Occasional cases, widely distributed in time and place):

    are observed in China, Japan, Taiwan, Korea, Philippines, Indonesia, Malaysia, Singapore, Myanmar, Bagladesh and Eartern areas of Russia.


  • Regional, seosonal outbreaks (large number of cases occuring simultaneously at the same time and place):

    Occurs in Thailand, parts of India and Srilanka.

Last Updated on:06/05/2014