I've read all five of your chapters so far, and I really like it!
I do find it a bit confusing in Beck's chapter 2, where it went from her being dragged to Greg to her arguing about hunters. Maybe state his reason for him getting her in the first place.
I like how you explore the characters' POVs and explored the apocalypse's effects. You even got a reason for the spreading, which some people don't even care to write out. 
They are all pretty likable. Personally, I would've called Greg a Little Bitch~ :D