I'm not even going to comment on the script. There are serious formatting issues here. If you want to make money as a screenwriter, you have to be professional and learn the format and structure.
This script is a GREAT start. I can see where it is headed. It needs a lot of work but is a NEW twist on the whole Zombie concept. I loved the fact that it isn't your typical zombies killing dumb and stupid zombie idea. This is an intriguing story. It is only 28 pages but the story is in tack and simply needs to be extended and complicated a bit more.