Mosquitoes are notorious for spreading malaria in sub- Saharan Africa. There has been a Scientific breakthrough to prevent the spread of malaria. Scientists at the University of California have genetically modified a Mosquito to be resistant to malaria. Their aim is to create mosquitoes which fight malaria and which will then pass this gene to later generations and hopefully eliminating malaria.
In Brazil, Mosquitoes have also been modified to kill off mosquitoes which carry Dengue fever. The Oxitec company and the Brazilian biotech company have to teamed up to release these modified mosquitoes into large local mosquito populations for a two year trial period.
For more information, Here is the link: Mosquitoes