The first season was great. It was the most realistic zombie show I had seen.
Either the show decided to kill of 2 of their characters, one of them being a main character, or they simply forgot the rules they established in season one. And forgeting your own rules is one of the unforgivable sins among any series.
Laying a zombie ontop of a wound means that you are now infected. Getting sprayed with zombie blood in your mouth, noose or eyes means that you are infected.
Everyone seems to have forgotten that they main reason to be afraid of zombies is not that the zombies might kill you, it is how easily you get infected and turn into a zombie. Without hesitation everyone started to fighting the zombies with melee weapons, and nobody seemed scared by the fact that a single scratch from the zombies will kill you. They happily smashed to zombies head to pieces, and ripped them open and stuck in their hands into them without considering that getting zombie blood on a single tiny wound on your body will kill you. Everyone in that group works alot with their hands, lifting stuff and scavaging, especially the guys, getting several tiny wounds on their hands, and then they stick their hands into zombie intestines? well, its ok, since he is wearing cloth gloves?
So, three of the main cast must be zombies within a couple of episodes, and if the group continues to use melee weapons they will all probably be zombies within 5 episodes, its mearly a question about time.
So much for the realism of this show...