The reason I ask is because our bodies as human beings have an amazing immune system and unless you have an autoimmune disease, naturally our bodies can heal ourselves from sickness.
I’m speaking primarily on the common cold, Influenza or anything similar like it, including even COVID.
Remember how Europeans came to North America and wiped out most of the populations with diseases (besides genocide) because it was a new disease the immune system had not experienced? COVID is like that, its changed enough from the previous Corona Viruses that people die without vaccines. Some may survive, but chances are way netter with the immune system having a preview.
I agree that the Europeans brought plenty of diseases to the Native Americans. However, you’re completely forgetting the part where the Europeans commuted intentional genocide against most of the Native Americans.