There really is not true answer to that but some scientist and researchers say that it could be past from anything. For example a rat, or a mosquito,and even by clothes of one who was infected.
smallpox
by the europen
The europeans had a immunity built up to smallpox by the time they made it over to america
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.
United States of America
smallpox
No. Chickenpox did not come from smallpox they are 2 separate viruses.
Some diseases brought over from Europe to the Americas included smallpox and measles.
The smallpox vaccine comes from cows. Most diseases you a weakened form of the disease. However the smallpox vaccine is brought from cowpox. (closely related to smallpox but not as dangerous). You cannot get this vaccine anymore and if you did it would result in a bad reaction.
Smallpox
they caught it by high fevers and blisters, and when they traded with the British.
The Europeans affected the aboriginals by decreasing population