thenammagazine
Super Freak
Hopefully it doesn't take a lot of time to answer what this mysterious illness is. It looked like Potter turned into a Zombie, but he was never bitten. If I had to guess, he must of eaten something tainted.
The mechanism for infection seems to be from either bite or dying and reanimating. I think eating tainted food would be the same thing as a bite in this case. Someone must be infecting the food or water supply.
The original infection was definitely airbourne, maybe they're changing it up this season.
It's got something to do with the water. I'm betting either the girls are experimenting by putting Walker pieces into the water or there's a bunch of infected in the well the prison is drawing its water from. Then eating that is killing them and then, naturally, they turn into walkers.
The zombie eating the rat was disturbing
That was a preview from Talking Dead of next week's episode (it's the prologue for it though so not really "spoiler" territory). The girls are feeding them like pets. This is probably also why there are so many walkers at the fence.