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It hasn't been proven, but there is speculation that Christopher Columbus' voyages were responsible for introducing syphilis to Europe and small pox to the new world.
George Washingtion
Mutation
The diseases the Spaniards carried were responsible for killing the vast majority of the native population
The railroads.
No, that was John Ralph.
The Spanish missionaries .
Who was the scientist who first suggested that the bacteria are responsible for many diseases of humans and animals
responsible
According to MSN QnA Beta, white blood cells are responsible for getting rid of diseases.
Diseases from Europe that the Spanish were immune to affected and weakened the natives.
Yes, - well Sicily actually, somewhere around the time of the Crusades.