freeworldgroup.com

3 Years ago, there was a Infestation. People everywhere were infected. However, that time ended. and peace returned to the world. However...There was a School Teacher with a TERRIBLE illness. The Students were infected by the teacher, then the infection started spreading like a wildfire. Millions were infected by this Cataclysm. The world was at it's end, a few people stood up to wipe-out the remaining zombies that spread the infection, The survivors were powerful, and had a ton of experience with killing zombies. The "Queen" had to be eliminated before she infected the entire world. (The Queen Is the Teacher, just so you know.)

Fun.

But what the townspeople didn't realize is that zombies can only be fully killed if you destroy their brain completely. Knives and bullets clearly got them nowhere, until they figured out that you had to literally make the zombies heads explode...
Since it took too long for people to realize this, most everyone was turned and those who weren't turned either died or were lucky enough to escape and share the story...