CURRENTLY IN THE PROCESS OF BEING REWRITTEN!

What if there there was a serum that created the perfect zombie. What kind of world would we live in. Where humans are not at the top of the food chain anymore. Where humans are nothing but cattle. Well these aren't ifs in this world. 17 year old Kayla is apart of a little rebel group. There's only a limited amount of survivors left. Can the last the of the survivors hold out?