Welcome to Highschool-of-the-dead Answers. What would you like to know?

Thats a hard one but i think that the reason for this is to show difference in the type of zombie , also think of it this way maybe they were "them" but were killed by someone else ? or maybe when bitten the infection could not effect them because the brain was too damaged.

I don't think that they know.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.