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This question already has an answer here:

It was stated earlier in the series that all the survivors are already infected with the zombie virus, which is why even someone killed by a gunshot will reanimate if their brain is intact.

However, why do people who are bitten by zombies wind up dying, if they're already infected? What is the new, 100% lethal and incurable thing introduced via the bite, which the survivors don't already have in their blood?

If they're just falling victim to the general filthiness of being bitten by a rotting human, why do they skip straight to amputation, rather than attempting to use alcohol, boiling water, cauterization, or even penicillin (when available). Or, barring all that, just give the injured person lots of water and hope that they pull through on their own?

I'm preferably looking for canon answers from the show, but I'd also be happy with an answer from the comic if the show hasn't addressed the issue.

marked as duplicate by phantom42, user1027 Apr 4 '15 at 1:15

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Usually these bites happen out on a run where there are no medical supplies like alcohol and antibiotics readily available. Back in season one, they did use the "water, hope, and pray methods" with Jim and Amy. They don't work. Arguably, they also did it with Tyrese and Bob. – phantom42 Apr 4 '15 at 1:07
  • There's also some discussion here about the need to treat the new infection quickly. – phantom42 Apr 4 '15 at 1:09
  • Thanks, I didn't see the other question when I searched prior to writing my own. – Liesmith Apr 4 '15 at 9:39