I think it should, though?
Because it seems logical to have a higher change of getting ambient diseases when you spend time around people infected with them.
Maybe we can use the scent trail to make an “infection trail”.
Also, this WIP on Git "Applies special zone post processing to generated maps, allowing for things like looted, overgrown, and fungus covered cities."
Maybe a biohazard type could be added to it? Infectious zombies wearing damaged hazmat suits, contaminated water and food, increased chance of getting sick, and other effects like that.