I'm no kind of expert, but I know the infamous "brain-eating amoeba" (https://en.wikipedia.org/wiki/Naegleria_fowleri https://en.wikipedia.org/wiki/Naegleria_fo

I'm no kind of expert, but I know the infamous "brain-eating amoeba" (https://en.wikipedia.org/wiki/Naegleria_fowleri https://en.wikipedia.org/wiki/Naegleria_fowleri) can kill in days. It seems like a lot of things have to go wrong at once to get an amoebic infection, but once you do they're really, really nasty.