One big thing I've noticed -- Illnesses and "bad" events happen if you haven't checked up on and kept the fire going. When I remember to stoke the fire at least once a day, before it has a chance to run out, I never have a problem. Several times though, when I didn't get to it in time, and a day goes by (even on 1/2 time) without the fire being lit, the event that comes up involves some kind of tragedy, like a flock of parrots attacking, or a mysterious whatever washing up on shore and making villagers sick.

Not the best recommended way to have your villagers learn about healing and training your doctors LOL.