1 Answer

There is nothing wrong with answering it again...maybe they didn't get your answer the first time. Anyway. From Wikipedia:

The Black Death was one of the most devastating pandemics in human history, peaking in Europe between 1348 and 1350. It is widely thought to have been an outbreak of plague caused by the bacterium Yersinia pestis, an argument supported by recent forensic research, although this view has been challenged by a number of scholars. Thought to have started in China, it travelled along the Silk Road and had reached the Crimea by 1346. From there, probably carried by Oriental rat fleas residing on the black rats that were regular passengers on merchant ships, it spread throughout the Mediterranean and Europe.

@Yvonne57 If you looked at the history of the answers given you would see I was being polite