How did the black death travel from sarai to cairo

#1) How did the black death travel from sarai to Cairo?

As we already know the Black Death was a widespread epidemic of the Bubonic Plague that occurred in the 14th century, resulting in the death of millions of people. The way that the Black Death traveled from sarai to Cairo was by trading routes on both land and sea. Rats were the carriers of the flea that spread the disease.

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