The Black Death most likely originated in Central Asia or East Asia,[11][12][13][14][15] from where it travelled along the Silk Road, reaching Crimea by 1347. From there, it was most likely carried by fleas living on the black rats that travelled on Genoese merchant ships, spreading throughout the Mediterranean Basin and reaching Africa, Western Asia, and the rest of Europe via Constantinople, Sicily, and the Italian Peninsula.https://en.wikipedia.org/wiki/Black_Death