The most dangerous diseases are usually a result of jumping species. This usually only happens when humans are in prolonged contact with that species, such as domesticated animals (swine flu, bird flu, etc)
The indigenous people in the America’s hadn’t domesticated anything other than llamas in South America, so there wasn’t much of an opportunity for anything to jump species, whereas Europeans had pigs, cows, horses, chickens, ducks, etc to give things like small pox and the flu.
Latest Answers