Mosquitoes around the world are known carriers of dangerous and potentially deadly human diseases such as West Nile virus, yellow fever, dengue, malaria, and Zika. In recent years as scientists have moved away from the hazardous insecticides of the past, their focus has turned to genetic modification as a more effective and less harmful way to control mosquito populations. But new results published in Scientific Reports by Yale researchers show that this new plan of attack is not without its bugs — literally.