Totally disagree on the zombies are human thing. Once you are a zombie/walker, you are the undead creature. You cease to be human. You have no emotions, feelings or soul, your only purpose for existence is to feed off of the living humans and kill. The way I see and understand infections/outbreaks, the virus or bacteria must be cured/treated with a treatment, either to be controlled/managed, or eradicated. There are some however that are too advanced and treatment will fail. It's the nature of the way medical treatments work. Because we all have unique immune systems, we all respond differently to treatment. There is also the power of faith, and prayer. Personally, I believe these combined with treatment are possibly the strongest combination of any treatment available.
Ok off soap box.