In my WIP the world gets wiped out by a plague/virus. This virus blankets the earth's main population centers. The main focus on the story is finding areas that are untainted. The plague/virus also acts as a traditional disease which can be transferred by infected people meaning that even unaffected areas can be contaminated causing the small areas that are still inhabitable to shrink.
That's how it has to function for the story, but when I came up with the idea I didn't really look into how it would function compared to something realistic. Actually, it was originally the story supposed to be a nuclear war and fallout (hence the finding untainted land part) but since that was done to death I figured a virus of some sort would make for a better story. But I'm still frustrated as to how I describe how this type of plague would work.
That's how it has to function for the story, but when I came up with the idea I didn't really look into how it would function compared to something realistic. Actually, it was originally the story supposed to be a nuclear war and fallout (hence the finding untainted land part) but since that was done to death I figured a virus of some sort would make for a better story. But I'm still frustrated as to how I describe how this type of plague would work.