Quote Originally Posted by Owen
I'm not sure myself whether normal units can catch plague, even if they don't have a flag to indicate whether they have it or not.
Military units absolutely DO carry the plague. Its the subject of my thread on how the hell to determine whether they still have it or not as there is not obvious indicator on the unit flags.

So, the only way I have been able to check is to move a spy into a suspect unit stack and see if he catches it. Not very scientific.

What I haven't managed to confirm is whether fleets carry it from port to port, I assume they must as supplies and things from the city would almost certainly infect them.