Who brought the diseases to North America?
Why were Native Americans more likely to die from the diseases the European settlers brought to America than the settlers themselves?
Beginning with diseases such as measles and smallpox brought over by Europeans when they came to colonize, such as measles and smallpox, yes immigrants bring diseases with them when they come to America. In fact, diseases brought along, intentionally and unintentionally from Europe have killed off many of the native peoples in many parts of the world.
European explorers brought infectious diseases to North America which the Native Americans had no natural immunity against. Chicken pox, measles, and smallpox were common and rarely fatal among Europeans, but often proved deadly to Native Americans. Epidemics sometimes destroyed entire village populations. Some historians estimate that up to 80% of some Native populations died from European diseases.
Native Africans were brought to North America as slaves, hundreds of years ago. The English and Spanish Settlers needed a labor force, and unlike the Native Americans they were using before, Native Africans were immune to the diseases the European settlers brought with them to "The New World". They were also used to picking crops/gathering food; this made them far better workers than Native American slaves.
There were a number of diseases that followed Spanish colonization of the Americas, one of the most devastating of which was small pox. Whether this came with Columbus or later is not known. Conversely, many believe that Columbus' crew brought syphilis back to Europe on their return from the Americas.
The Spanish brought horses to the Americas, but equine species were present in North America in much earlier times. Originally, there were horses in North America that migrated to Asia and Europe thousands of years ago, across the Bering Strait land bridge. They subsequently died out in North America, and modern horses (their descendants) were taken to the Americas by Spanish conquistadors ss military horses. Horses originally came to North America on the Beringia land…
In 1441, the first slaves were brought to Portugal from northern Mauritania. ... By the year 1552 black African slaves made up 10 percent of the population of Lisbon. ... to the colonies in the British West Indies and British America. By the late 1500s slaves from Africa were brought to north America (Scientific American).