Question

How did migration spread smallpox from Europe to the Americas?

Answer 1

Migration led to Europeans, who were immune or resistant to smallpox, moving into an area that had no experience with it.

Step-by-step explanation:

Indigenous Americans, who had never been in contact with smallpox before, ended up being perfect incubators for more violent, more transmissible forms of smallpox, as both their innate and developed immune systems had never fought smallpox.

Answer 2

The European colonizers brought small pox an endemic virus in Europe to the native Americans on boats. The natives were not exposed to this disease before and thus were very susceptible to this illness.