The fan theories about Bob Stookey (Larry Gilliard Jr.) may end up being more interesting than what the writers actually do with the character on The Walking Dead.
We know TV Bob was the sole survivor of his past two groups, and he just joined Team Prison about a week before the events of Season 4 started. He admitted to killing one person because “she asked me to.” He has a bit of a drinking problem, but mostly for “when it gets quiet” because he hates to be alone. He was bitten on Episode 13, but the walker bit him on his bandage. How convenient! Unless there’s more to the story than that?
TWD fans on Reddit have been debating some very interesting Bob theories. Here’s what one fan wrote earlier in March: "So my dad sent me this and I thought it might have some truth to it: ‘Bob is immune to zombie bites. He had a pretty significant bite and said it was on the bandage. He's always the last survivor of every of group.’"
That may sound wild, but other fans picked it up and ran with it. One responded, "As an army medic, he may of injected himself with many so called ‘cures’ and therefore one of them may have worked. Good theory!"
Another fan added this extended analysis:
“The more I think about this the more ideas come to me. We learned from Morgan in Season 1 that everyone who became a walker died from some sort of fever first. Maybe Bob had been working on a vaccine somewhere during the initial outbreak, and just before his lab was overrun he injected himself with the experimental vaccine, only to later discover that it worked. The only problem was he didn't have any more of the vaccine or a facility to develop it again, so he's been working to try to figure out how to get the vaccine that runs through his blood into a form that he can give to others.
The flu came to the prison as soon as Bob arrived. Maybe Bob exposed the group to the vaccine he was working on, and some had an adverse reaction and got sick instead with the same flu like disease that everyone died from when the apocalypse began, while others were apparently immune. Since ‘A vaccine typically contains an agent that resembles a disease-causing microorganism’ it would be feasible that some with a weaker immune system could catch the disease, although maybe not bad enough to kill them. We know all of these people have to have some sort of immunity to the walker disease or they would have died during the initial outbreak that did in 90+% of the population.
When the group was split into groups, Bob was left with Sasha, who was one of the ones that got sick, and Maggie, who didn't. Perhaps that is why he wants so bad to stick with Maggie, to see if she gets bit will she somehow live, and prove that his vaccine worked. Maybe he's keeping all of this a secret because he needed to expose this group to the vaccine, and knew that they wouldn't be willing participants in his experiment, and he doesn't want to tell them now because many of their friends died during his experiment.
If I remember correctly, Bob had a box he was carrying around during the first half of the season, too. Perhaps that contained his precious vaccine.”