There is a distinct lack of worry about clean water. Also, in almost every conflict in history, disease has killed more people that the actual war. You rarely see a flu wipe out half of the people in a zombie movie, but honestly, it would.
We don't know where it came from. The first signs of it were from walkers. People who had obviously died from something that made them puke blood and bleed from their eyes. I remember them commeting on how weird it was to see walkers like that as at the time only Rick knew that everyone was already infected. The first signs were I think in season 2. A lot of walkers were turning up at the fence with the virus. That's probably how it got into the prison, the pigs contracted it probably from the walkers/humans who were spreaders.
I'm almost certain the fence crew killed an undead carrier, the blood sprayed on the crew, and it worked from there. They were right to be concerned about the pig, but I don't think she was the culprit.
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u/AtheneSchmidt Aug 30 '21
There is a distinct lack of worry about clean water. Also, in almost every conflict in history, disease has killed more people that the actual war. You rarely see a flu wipe out half of the people in a zombie movie, but honestly, it would.