The+Columbian+Exchange;+The+Spread+of+Diseases.

Columbian exchange

The columbian exchange had a major part in the spread of the diseases in the Americas. Some of these diseases were The list of infectious diseases that spread from the Old World to the New is The list of infectious diseases that spread from the Old World to the New is long the major killers include smallpox, measles, whooping cough, chicken pox, long the major killers include smallpox, measles, whooping cough, chicken pox, bubonic plague, typhus, and malaria Denevan, 1976 Because native popula- bubonic plague, typhus, and malaria. Because native populations had no previous contact with Old World diseases, they were immunologically tions had no previous contact with Old World diseases, they were immunologically defenseless. Dobyns 1983 writes that before the invasion of peoples of the defenseless. Dobyns 1983 writes that before the invasion of peoples of the New World by pathogens that evolved among inhabitants of the Old World, Native New World by pathogens that evolved among inhabitants of the Old World, Native Americans lived in a relatively disease-free environment. Before Europeans Americans lived in a relatively disease-free environment.Before Europeans initiated the Columbian Exchange of germs and viruses, the peoples of the Amer- initiated the Columbian Exchange of germs and viruses, the peoples of the Americas suffered no smallpox, no measles, no chickenpox, no inl icas suffered no smallpox, no measles, no chickenpox, no inl uenza, no typhus, no uenza, no typhus, no