We are closer and closer to finding ways to use nanobots to solve a ton of problems for both humans and animals alike. Right now, it is uncertain how far we can go with them. The theory is that the possibilities are endless due to the fact that you can pretty much put them into anything. Specifically, we can inject them into the bloodstream and have them attack certain parts of the body to help us defeat diseases.
Right now there are experiments with nanobots revolving around helping remove cancer issues too. However, due to the possibilities being so endless with nanobots, it’s at least possible to see them used for evil. If a person decided to weaponize them and use them to take over the brains of human beings…this could turn into a real zombie apocalypse. Imagine people walking around mindless, having to do whatever someone claimed. They could force them to kill and even eat other humans!