The zombie apocalypse has been on my mind a lot lately. That may sound dramatic, but if you’re someone who reads and watches fiction like The Last of Us, 28 Days Later, or the sequels: 28 Weeks Later and the new 28 Years Later, you know that the zombie hordes are all around us. For those who don’t know what I’m talking about, a lot of zombie or similarly-themed fiction base their monsters around the idea of humans being infected by something which takes over their brain function. And, like all of the scariest things, that fiction has some basis in fact.