The first factors that caused diseases such as typhoid, smallpox, tuberculosis, and measles to be more present in North America before European contact …show more content…
When so many humans live together in relatively close quarters, particularly with lack of good, or any, sewage systems, disease spreads quickly with the general population continually getting exposed to numerous bacterium. The Europeans’ bodies had to adapt to dealing with many of those diseases, and for those who survived, their immune systems thrived as a result. All of these things resulted in Europeans being regularly exposed to many more viruses than Native Americans were. The Europeans’ immune systems simply developed to ward off the worst of some of the nastier diseases that disabled entire Native American