What diseases were on slave ships?
Well of course there was the usual gangrene, then leprosy, flux- a sort of flu, dysentery and extreme seasickness. Many slaves simply threw themselves off the sides of the ships in order to escape, or killed each other, to escape from the dreadful illnesses that stalked the Africans. Simple things, like colds, also wiped them out, their immune systems had never coped with them before.