The worst thing in an incident like this is, if you are immunity you the only motherfucker left that could get very nerve-racking for a few months. Then the other half of this, if a lot of people are immune, but it takes out a lot of other people you have to worry about other humans taking your shit or worst case scenario eating you. It depends of the situation. I just think a situation like this when it comes to the walking dead yeah be careful of the zombies, but be more afraid of humans.