I have the book What Really Makes You Ill?, why everything you thought you knew about disease is wrong by Dawn Lester and David Parker. On the section regarding malaria they diligently go through all the official fact sheets and studies regarding the cause and it is all contradictory. The conclusion is that the cause of malaria is still a theory. Using a pesticide like DDT to exterminate 100% of female mosquitoes is impossible anyway. When you read the whole section in the book, you realize the whole thing needs to be studied from scratch by independent scientists. The science is not only settled, it is being blocked from validation.