In the Group of children aged 2-14 years, the number of people, 10,275 concluded that the effectiveness of the vaccine is effective for Dengue virus type 3 and 4 is 75% effective and Dengue virus type 2, which is less effective is only 35%. In Thailand, found more Dengue virus type 2 after the year 2000, which is a problem because if the dengue infection type 2.
There will be severe symptoms and there is a high mortality rate.