Diseases from which two continents killed millions of american indians in the late 1400s and early 1500s

Diseases that came from European colonists

Explanation:

During the exploration of the Americas there were outbreaks of disease  brought by European colonists; the Native Americans lacked an immune system resistant to these diseases because they were never exposed to them. For this reason millions of people died suffering from syphilis, cholera, typhoid, tuberculosis and even scarlet fever. This is also know as the virgin soil effect.

answer; ecological fallacy;