maybe its a case of they are also evolving on a rapid celluar level or something so when the
jumpers have finished jumping about and eating people and getting high up and such, what else is there to do, if thier food source is depleted by their optimal hunting pattern is it a case they litrally died off. Jumpers strike me more as the kind that would die out that way where as the tattooed zombie and the regular zombies seemed to be more organised, the way they came in and took people when
Datu was Captured and the fact they can lay traps and even hunt and out wit normal alive people, they are definately organised and capable of indipendent learning and self intelligence, dispite thier pack mentality, this is also something i mentioned in a previous posting somewhere.
i thinking is a parasidic genetic virus, because you can have a genetic virus, you can also have a parasidic virus, so why not mix them together for this. it fits with my body fat theory too.