In the spring of 1347, a ship arrived in Italy, having returned from the Crimea. Many of the merchants and sailors on board were extremely ill, and some had already died. They had contracted the dreaded bubonic plague — later to be known as the Black Death. The bubonic plague is thought to have been the same as the Plague of Justinian that had ravaged the Byzantine Empire under the emperor of that name several centuries earlier. Ebola: U.S. Government Ignoring Lessons From History