East killing an estimated 25,000,000 people (Kohn 25). The third epidemic finally hit and that was in Europe from 1347-1351 killing one third of Europe's population. London especially lost half of its population (Kohn 25).
             Before the plague infected humans, the disease lived among rodents and used their intrepidness to travel across the face of this earth (Farrell 76-77).
             "Plague is carried by rodents like rats and squirrels, but is transmitted to humans by fleas who live on them. A flea, having ingested plague-infected blood from its host, can live for as much as a month away from that host before he needs to find another warm body to live on. When a blood-engorged flea attempts to draw blood from another victim, it invariably injects the bacterium yersinia pestis," (Snell Death).
             The pneumonic plague, resulting as a complication of the Bubonic Plague, and as an invasion of the lungs by the bacterium, spread from person to person without intermediary transference by fleas (Kohn 25). But the Bubonic Plague was only transferred through the fleas of rodents. For when an epizootic outbreak reduces the rodent population, fleas from the dead animals fail to find another rodent host and thus begin to infest man (Britannica 2001). Because all the rodents were dying the fleas had to find a new host to feed off of and this is how the plague was transmitted to humans. Transportation of the disease was said to enter Europe in different ways. The most obvious way the plague got to Europe and other countries was through trade. Ships carried infected rats that jumped aboard and went on their merry way into different countries spreading the plague. One story in specific gives a quite conclusive example of how the plague arrived into Europe.
             "Fear and anger at the disease gave way to accusation. The natives of the land began to blame the Italian traders who traveled in and out of their ports. The natives soon took up ar...