In story 3 Mac and Dennis are in the gas station fighting the person that came out of the bathroom that was a zombie.
RUN RUN RUN!!!!!!
Get in the truck!!!
In story 4 Anna screams and runs out of the place and behind her is a zombie. She has a huge gash on her leg and she is trying to get away, so Mac and Dennis tell her to get in the truck with Jeremiah the boy they found not infected..
I think that Anna is going to turn into a zombie and infect Jeremiah. Then they will team up and try to get Dennis and Mac, and soon they will turn into zombies.