I have an epidemic in Italy that's been going on now for over 20 turns, one of the Provence cities had low sanitation but that was fixed but now its like a game of ping pong, one city gets rid of the disease only to be infected by another city which in a few turns is also reinfected by the first city again and I can't seem to shake it off the Provence, all 3 cities have sanitation buildings and are supposedly in the green but the disease will not leave.

I can't replenish in that province or even recruit new units and I am not sure what to do, sort of abandoning the whole province and starting over....