The mosquito scourge is dependent on certain environmental conditions to survive and our meddling with nature as in the case of once arid lands, turning them into lush farmland may be responsible for spreading the disease. Mosquitoes thrive in tropical environments and with many tropical areas already infected, taming other places that used to be too harsh for them, where rainwater is so precious we try to collect each and every drop turning them into havens for the virus carrying mosquito.
Mosquitoes love damp conditions and need water to breed so our open water storage tanks plus the increasing changes in the weather brought about by global warming is in a sense felling the disease. Dengue has yet to jump the species barrier unlike the H5N1 and H1N1 virus which are proving to be too much to handle with health authorities trying to manage rather than contain due to futility in such efforts. A better understanding of the mechanisms of such viruses down to the molecular level is the best approach like the breakthroughs being accomplished with other diseases we humans are afflicted with. Time will come when we will have the sure for all these diseases, how long it take sis the answer and with millions being infected each and every year the price is truly immeasurable.