No zombies, hunh?
Zombies don't come from cemetaries. A zombie doesn't have the physical strength to claw out of the coffin, vault and dirt.
Zomibes tend to come from morgues, hospitals, and places like that, before the brains have been removed.
Which leads me to the fact that zombies DON'T eat brains. The brain must be intact to activate the zombie. If a zombie eats a brain, the new corpse can't reanimate because the brain is destroyed. Zombies eat flesh.
Ok?