Mosquitoes are a problem in Brazil because of their ability to carry diseases in the tropcial environment. In an effort to limit the spread of both zika and malaria, scientists genetically edited a cohort of the insects to be have offspring that immediately died. Their plan was to introduce these in the wild where they would breed with wild mosquitoes and limit the population.
When scientists introduced the modified mosquitoes, their plan seemed to work. The mosquito population dropped but less than two years later it has rebounded to previous levels.
Now, the hybrids are showing increased robustness, meaning they will be harder to kill in the future.
This would be a fascinating way to spread an infectious disease, maybe one that produces zombies. It could be the last ditch of humanity to save themselves from annhilation, and could also be a reason why colder climates are the last hopes for humanity, a common trope in zombie novels.
Another way this could be used would be an evil corporation introduces the mosquitoes, knowing full well they can’t be killed. These mosquitoes could be pre-loaded with a disease and then the corporation could charge a premium for the antidote.
