I had some ideas I want to share with you.
I dont know if that's possible to made them but you could like the idea.
Actually there is no need to change the display of the disease, just to make them occurs at the right place.
- Rats infestation that hit food/crop/vegetables storage or dock.
- Bug infestation that hit log/firewood/fabrics storage ...
- Sunk ship event, no delivery this year event.
By the way, new job, veterinary. (But it could be tricky to made if we need to manage the way he reach the disease).
none of these idea cant be set. out maybe a sunk ship that could maybe spawn when map is generated and maybe can "harvest" them for coins and goods ? maybe ?
but you cant have any control on events. neither disease touching something else than set in the core game (invisible to toolkit)