[Professor S]

Originally Posted by BreakABone

Its.. not much of a spoiler as Prof says, but yes in the book they come to the same conclusion.

Because, really.. ultimately.. its not about living... but how long they can live before they die.

Well keep in mind there is a BIG plot point that hasn't been revealed yet that isn't exactly in line with Typh's reasoning. Spoilers below:

So far in the TV series a person has been bitten to turn into a zombie, or they have been shown to have a bite mark. The assumption is that the disease is spread by physical contact. In the book it is revealed that if someone simply dies, and is not bitten, they still turn into a zombie. They are all "infected" right now, and all doomed to eventually become the monsters they are fighting even if they are never bitten. Hence, everyone on Earth is or will be the walking dead .