Sam's Illness?

Not long after the fall of the military base, Sam and his team had retreated and found solace in a nearby abandoned house.

There were no zombies around and Anderson realized that it might be possible for them to have some sort of life as long as they stayed here.

Anderson was glad that they stuck with Sam or they would have died long ago but there came the question of what to do with the doctor.

He was an extra mouth to feed while providing nothing in return, there was no cure and this man tried his best to benefit personally from the situation.

However, Sam had been speaking to the doctor a lot more in private, what he was discussing was unknown but with each conversation, Sam made it clear that no one was to harm the doctor.

This was a drastic change considering he initially wanted him dead prompting Anderson to be curious about what it was that they could possibly be discussing.