Aedes aegypti is a mosquito that can spread dengue, chikungunya, Zika fever, yellow fever virus and other such diseases. This vector, whose origin can be traced to Africa, is currently found in tropical, subtropical and temperate regions across the world. A biotech firm named Oxitec bioengineered these mosquitos and released them in the Florida Keys to combat vector-borne diseases. These male mosquitos, which are incapable of biting, will mate with female biting mosquitos. These encounters curb the population of biting mosquitos since their offsprings cannot survive.