Animal agriculture continues to this day to be one of the largest breeders of disease (see practically any E. Coli or salmonella recall in leafey greens — almost always due to animal runoff).
The old world lucked out in having a good number of dumb docile animals to domesticate, so it went hardcore on animal agriculture. As such they got exposed to a lot of disease.
The new world, not so much. We got some big game, but most of it was not something easy to domesticate. Either too aggressive, too hard to contain, or both. So they didn’t get the animal agriculture or the generations of fighting various disease that go along with it.
Biological warfare is a freebie because Natives typically didn’t have resistance built up that Europeans got from the black plague.
It’s my understanding the black plague was simply brought about by filthy living conditions in cities.
Animal agriculture continues to this day to be one of the largest breeders of disease (see practically any E. Coli or salmonella recall in leafey greens — almost always due to animal runoff).
The old world lucked out in having a good number of dumb docile animals to domesticate, so it went hardcore on animal agriculture. As such they got exposed to a lot of disease.
The new world, not so much. We got some big game, but most of it was not something easy to domesticate. Either too aggressive, too hard to contain, or both. So they didn’t get the animal agriculture or the generations of fighting various disease that go along with it.