These studies showed the presence and persistence of infectious particles in feathers as long as 5 days after the death of the animal [33]. (journals.plos.org)
So the fact that he was up and walking around again 3 days after his death makes him part of the living dead. (religion.blogs.cnn.com)
For instance, either he knew — not believed, but knew — that he would be raised on the second day after his death, or he did not know this. (religion-online.org)