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The Columbian Exchange: Crash Course History of Science #16

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Due to the Native Americans in the New World having no previous exposure to Yellow Fever and Smallpox, they also have no immunity to those diseases as well. By the time the Europeans of the Old World had arrived at the New World, they had already been exposed and infected with Yellow Fever. This meant that they had developed a sense of immunity to the disease, making it difficult for them to contract the disease again. But, they could still infect others, which is why many Native Americans ultimately died from Yellow Fever.
https://drive.google.com/file/d/0B8QPhD5gNryKTXRDUWdqVnpGY2c/view

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1. People transporting from the Old World (relatively all of the Eastern hemisphere) to the New World (the Americas and the Caribbean)
2. Tropical areas (like the Northern Triangle and the Caribbean countries) have been known as areas where the infectious agents thrive
https://drive.google.com/file/d/0B8QPhD5gNryKTXRDUWdqVnpGY2c/view

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The vector that is able to transmit Yellow Fever to humans is a mosquito that is commonly found in generally tropical areas. (Olden, Week 2 - Black Death Fleas and Rats, 2020). https://docs.google.com/presentation/d/1SAQy1B4Y_s_CkU6fYTQSNcMIZyeLQQ7B5nmsWHl3SnQ/edit#slide=id.g7d36c0a609_0_825

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Due to the extensive movement of people and goods during the Columbian Exchange, this also meant that the movement of disease and infectious agents was also prevalent.
https://drive.google.com/file/d/0B8QPhD5gNryKTXRDUWdqVnpGY2c/view

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DISEASE and DEATH
POPULATION:
Native Americans