two things....
1 - it's dumb that if you get bit you die and turn. you're already gonna turn if you die. so you've already got the virus. what's a walker bite gonna do? give you a virus you already have...right!? oh well.
2 - this is very important to me because it's driving me NUTS! I have read the comics up to a point. including and up to the point where Morgan leaves his house with them. guess I'm sposed to spoiler this so.....