Today, the most accurate conclusion we have about the Black Death is that it was caused by the bacterium Yersinia pestus.
The Black Death was a pandemic of plague that ravaged Europe during the fourteenth century and was transmitted by fleas transported by rats. It is believed that the epidemic emerged in Central Asia, from where it passed to Italian cities with great maritime activity such as Genoa, and from there to all of Europe. The Black Death ended with more than a third of the European population and some 45 million people worldwide.
The accepted theory on the origin of the plague explains that it was an outbreak caused by a variant of the bacterium Yersinia pestis, which appeared around 1320 in the Gobi desert and in 1331-1334 arrived in China, a year after major floods devastate vast regions of the country, reaching Europe in 1346.
