Talk:Weepers/@comment-142.177.61.187-20121011191740/@comment-3410662-20121014211934

They're like zombies, but they're still technically humans. It seems like the plague affects the brain in such a way to make them more aggressive. If you use the Heart to find out secrets about them, one of the things she says most commonly is that they (the targeted Weeper) has decided to try to spread the plague to whoever they can before dying.

So essentially, the plague makes them feel despair, as well as making them far more aggressive towards unaffected people.