Vector-borne diseases like dengue and malaria still have a significant impact on the socioeconomic status of countries in south Asia the WHO said Thursday calling for a united effort against them. 'These diseases are still killing thousands of people in the WHO southeast Asia Region' a World Health Organization release said. Forty percent of the global population at risk of malaria lives in the WHO southeast Asia region home to a quarter of the world's population it said. 'These are deadly but preventable diseases. The solution lies in a united and sustained effort from all of us' said WHO regional director Poonam