The CDC has even released a document titled
"Preparedness 101: Zombie Apocalypse." The point, obviously, isn't that the CDC expects a zombie apocalypse around the corner; it's that since a zombie apocalypse is simply an infectious disease apocalypse, talking about how to avoid becoming a zombie is a safe way for people to talk about how to protect themselves from pandemic disease.
"When confronted with real anxiety, a lot of people shut down," Brooks said. "For them, planning for an actual crisis is just too scary, too paralyzing to think about. Make it a zombie attack, though, then there’s some psychological padding."
Pandemic disease is something our culture thinks about, knows about, fears. It's so topmost on our minds and in our nightmares that we've created an elaborate metaphorical architecture so we can talk about it even with people who are too scared to talk about it. We think about it so much, it seems almost ridiculous that we aren't ready. But we're not. Not even close.
Just look what happened with Ebola.