If only I was Frank West or Chuck Greene. 
They only didn't get infected because all the bites they took weren't deep.
And the zombies were so loving handicapped trying to scratch them.
also don't hide out in your house unless you have walls made out of titanium.
Drywall can easily be shot through,why not punched the forget out of by mindless bloodthirsty zombies with no sense of right or wrong?