The Toxoplasomsis parasite infects over 800,000 persons each year in the United States. We are finding out our models were wrong, and this parasite can cause cysts and behaviorial modification(probably via hormones) in human brains.
No one talks about this, and I only found out because this parasite was giving me polycystic ovary syndrome! It's all an absolute nitemare, and a great awakening about how these parasites violate our bodies and minds.
I think Evolution is the biggest enemy that we as humans must overcome with technology.