Quote: Yes they carry the zombie contagion. That is why it is passed on by bite or even scratches. Even a person who gets stuck by an arrow dipped in walker blood.
Like Black Guardian said...everyone already has the contagion in their blood anyways. If they die they turn.
The simple fact is the shows rules don't make sense. People who get bit by the zombies become zombies. But everyone is already infected with zombie-itis already. So why isn't everyone already a zombie. Why do you living people have to get infected twice? Makes no sense.
A show about walking,,killing dead people isn't going to stand up to the scientific method. Walking Dead uses the Romero rules heck he was even going to call it Night of the Living Dead until it was pointed out that using that title would make it impossible to protect any of the material or merchandise from public use. I am not as big a fan of the books after issue 100up and that is holding true to this season and Romero help us if this story line drags out like the comics.