How did smallpox spread from Africa to Europe?

Answer:
During the slave days there was a triangle of goods being shipped. Europe shipped weapons to Africa, Africa shipped slaves to America, ans America shipped sugar to Europe. On one of the gun runs a European captain caught smallpox and brought it back with him.
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First answer by Crackerjack122394. Last edit by Crackerjack122394. Contributor trust: 7 [recommend contributor recommended]. Question popularity: 92 [recommend question].