Why if instead of spending money researching the diseases that mosquitos could transmit to humans on the future we spend all that money into figuring out a way to exterminate all mosquitos from the surface of earth once and for all? As someone who lives on a tropical country and had have both Dengue and Chikungunya I can attest mosquitos are pure evil, and there are several researchs suggesting they serve no purpose…
The how already exists (genetic engineering) but it will probably never be done due to political reasons.
It's not like we "know" it can be done, but the politicians won't let us.