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To Black Death spread to Italy from modern-day Russia. It was spread by Genoese merchants fleeing a Mongol attack on their trading post in Crimea. The plague was carried and spread by the fleas that lived on the Black Rat and brought to Italy on the Genoese ships.<ref>Pullan, Brian S. ''[https://www.amazon.com/gp/product/B00CMHGO4K/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00CMHGO4K&linkCode=as2&tag=dailyh0c-20&linkId=15e48ba82dfc5f5eeee14a1e5eca5898 History of early Renaissance Italy: From the mid-thirteenth to the mid-fifteenth century]'' (London: Allen Lane, 1973), p. 76 </ref> The population of Italy was ill prepared for the spread of the disease. There had been a series of famine and food shortages in the region and the population was weak and vulnerable to disease and furthermore, the population did not have any natural resistance to the disease. Italy was the most urbanised society in Europe, Milan, Rome, Florence and other Italian centres among the largest on the continent.<ref> Pullan, 1973, p. 89</ref> The majority of the urban population in cities such as Naples were impoverished and lived in squalid and dirty conditions. These factors ensured that the diseases spread quickly and that there was a high level of mortality, among the poor, although even the rich could not escape the plague.<ref>Andrew B. Appleby's "Epidemics and Famine in the Little Ice Age." ''Journal of Interdisciplinary History''. Vol. 10 No. 4., p. 56</ref> From the cities,the plague spread like wildfire to the small towns and villages of the peninsula.