Dengue fever, a mosquito-borne viral disease, has been on the rise over the past 50 years, mainly in Southeast Asia.
       A multi-agency study of dengue by the Indian Institute of Science (IISc.) has shown how the virus that causes the disease has evolved dramatically in the Indian subcontinent over the past few decades.
       Dengue is a mosquito-borne viral disease that has been on the rise over the past 50 years, mainly in Southeast Asia.