I was getting at the fact that most people don't know that is some scenarios of zombie outbreaks. Most people are already infected as in when they die they will reanimate. Regardless of how they die unless it was from a head wound. Something that would be powerful enough to scramble the brain a bit. So people who ate pills would be the most "human" looking zombies. Thus people close to them could get confused. Also there is the attachment factor. People who feel as though they love someone too much and cannot take it upon themselves to kill said loved one. Another thing... in the walking dead show there were the misunderstood people. People who didn't realize what the situation was and believed in faith or something to come save their loved ones. There are many factors to take into consideration.