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Brought to New World through European carriers. This killed almost 90% of Native Americans who did not have the immunity to fight measles disease.
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Brought from crew of Christopher Columbus to New World.
Affected Natives who weren't immune to the diseases -
Believed to be brought from the New World to Old World from crew of Christopher Colombus.
There is a lot of controversy about how syphilis spread. Many believe it was already a disease that existed in Europe. Others believe it was brought back from the New World. -
Brought to Old World from New World from Columbus's crew.
Affected and killed many Natives who were new to the disease and didn't have the immune to fight it. -
Brought to Old World from New World through Columbus's crew
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Brought to New World from Old World through humans and/or animals
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Brought to New World through European carriers. Killed many in Hispaniola. Only about 10,000 were still alive after that.
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Brought from the Atlantic Slave Trade to New World from Africans slaves. Slaves were immune to them, but Native Americans were not.