Board Thread:Off Topic/@comment-5320677-20130702030735/@comment-9887604-20130702065634

Well I am going to do what you said not to, "That can't happen it's completely impossible". I will however back up that statement with the lore from the game. Draugr are not actually dead, they have been kept alive by some force the dragons taught the dragon priests. Every night the draugr convene around their particularly leader of the city and give them a portion of their life essence thus sustaining his life and their own. This information comes from the in game book Amongst the Draugr.

Now if you wanted to go down the line of diseases causing a zombie outbreak I think you could possible look to Peryite or other Daedra of causing an undead plague. Dagoth Ur created something similar to a zombie outbreak with his corpus disease in Morrowind. There is also the story of Umbriel, a flying city from Clavicus Vile's realm that killed mortals and then filled their bodies with some kind of moth like spirit.