Mob Premade monsters

Hrm, if it's radiation transforming them, wouldn't they be mutants instead of zombies?
I suspect zombies should be infected lifeforms as they should be. Probably infected from some meteorite disease of some sort?

 

Yeah thats what i was saying before to some other dudes on this forum, but they still said that mutated versions of people are still basically zombies. Mutated versions have an explanation for why they are as they are, zombies do not.