Cordyceps. C-o-r-d-y-c-e-p-s. It’s around in your time, too, it just only effects ants and plants and that. But someday it will mutate and maybe spread to people. And when it does, it hijacks the host’s body and sets about trying to spread, so the infected are violent.

And don’t worry. If it wasn’t relevant to my daily life, I wouldn’t know how to spell it either.