It's not just the program that is about zombies. The lady's book title refers to zombies as in everyone coming down with immune system illnesses that, due to weakness, lethargy, etc., is turning everyone into a form of zombie. Take you for example. Sitting there typing responses that just don't make sense. See? Zombie material, I tell ya. Please don't be offended. You are obviously not alone in your zombosity. The author is saying we are all being turned into zombies like you due to the break down of our immune systems.