That’s right. That explains why Sean got up after Rick stabbed him.
I don;t get it though. Randall died. They said he turned. Why didn`t he fully re animate
I assumed Sean was infected by the knife he used to cut his hand with for blood to draw zombies to the bus door after using it to stab the zombie cops in the head at the fence.
Yes, it explains one thing, but it confuses a lot of other things.
(1) If everyone already has the virus, and it just "actives" when people die, why is getting bit by a zombie a big deal? Why did Jim "turn" in season 1 when he got bit? It was only a flesh wound. The bite, by itself, should not have been fatal. If Jim was already a carrier, why did the bite matter at all?
(2) If Jenner at the CDC told Rick that everyone was always a carrier, why didn't Rick stab Shane in the head after he killed him, "just to make sure?" And if he was really testing Jenner's theory--as he later implied to the group--why did he allow himself to get surprised by zombie shane after his idiot boy, Carl, showed up in the field? Wouldn't he have been keeping one eye on Shane throughout that confrontation with his boy?
(3) Finally, if everyone is a carrier, why did we see so many dead non-zombies earlier in the show, like in their cars on the road, for instance?
I like the show--boring Season 2 aside--but I'm a little irked at what appears to be wholesale rule changes mid-stream. I'm aware that this particular rule change is consistent with the comics, but for some reason, I wasn't bothered by it when I read the comics. I am now.