"Without effective action to mitigate and adapt to the adverse effects of climate change on health, society will face one of its most serious health challenges."
Kurosu agrees that climate change is a factor, giving rise to longer periods that infected mosquitoes can survive. Adverse conditions, such as drought, however, can also impede the spread of the disease.
Drought in parts of India this summer has denied the mosquitoes the water that their larvae need to develop, leading to "extremely low" numbers of dengue cases this year, the Times of India reported.
Urban centers affected worst
Korosu says, the primary cause of the spread of dengue fever is linked to population movement and the rapid urbanization of developing countries, the majority of which are in the tropical zone most often affected by dengue fever
There is no cure for, and no vaccination against, dengue fever, The disease can develop into a "potentially lethal complication" called severe dengue, also known as dengue hemorrhagic fever.
The WHO estimates that there are over 50-100 million cases of dengue worldwide each year, although a new study says the true number may be four times as high as that appraisal.