He encontrado + informacion al respecto; http://forums.worldofwarcraft.com/thread.html?topicId=11693661399&sid=1
2. You can convert someone as a Zombie horde without killing them. Every Zombie auto-hit will reduce the time to the infection "going off" (which starts at 600 seconds) by ten seconds. Thus, sixty hits from Zombies without disease removal will auto-Zombify someone. If you've got a group of, say, thirty Zombies (which takes a bit of coordination, especially this early in the event), they don't stand a chance, and if they're good sports it'll only get worse. Edit: Mangle! may also have this effect, which doubles a Zombie's burst effectiveness... er, infectiveness.
Asi que mis disculpas, pero de nuevo, repito, hay formas de decir las cosas y por el momento yo he defendido mi punto de vista con fuentes oficiales y sin faltar.