Apart from the hospital, medicine, rat catchers, enough compost heaps away from homes, etc…
Maybe try more water wells and make sure there is enough soap in markets near homes so they can buy it and keep themselves clean. Maybe even clothes and shoes too.
Here is a couple of good websites that shows MOST of the diseases…
I must be doing something right with those, and three hospitals. By far, the leading cause of death in my village is old age! Villagers do get sick and injured, but the majority of them are cured.
BeeStings…I place beehives next to farms, away from homes. This lessens the chances of being stung, and also makes it easy for farmers to collect the honey.
Colds… I suppose clothing, shoes and firewood may help. (if masks were a thing we could add masks)… lol