I've just read a little "human interest" story in a magazine that I thought would make a neat little bit of local color for a fantasy game. Vietnam has 80 known species of snake. 79 are poisonous and the last one is a giant python that will crush you to death.
Apparently, in the Mekong delta region, snakebites are not uncommon but going to the hospital is a real journey involving motorbikes, boats, and monkey bridges. Rather than trying to go to the hospital and dying on the way, the people go to their local snakebite healer. The article I read was about an old woman who has been doing it ever since she was little and saw her grandmother treat someone. She has an herb garden in front of her house so she doesn't need to waste time gathering wild herbs for her herbal remedies.
When someone is bitten, she studies the bite to determine what kind of snake it was so she can prepare the right mixture of herbs to treat the poison. The recipes of her herbal remedies are a family secret, but she never accepts any money for her treatments. It just struck me as being like something out of a game: the swamp is full of poisonous snakes, but the village has an old woman who will give you "cure poison" potions for free.