“.......what is a Grade 1, 2, or 3 zombie?”........
I have no idea myself but like “zombie”, that too is made up in someone’s mind. The statement was made in jest.
The question occurred to me because tv and the movies have somehow managed to transform vampires and werewolves into sympathetic characters and (sometimes) romantic leads. At the rate we’re going, it won’t be long before tv is giving us romantic zombies.