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Bubonic plague broke out in Gobi Desert in China and started to spread rapidly
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The plague then spread to Central Asia near Lake Issyk Kul
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The plague was then spread down the Lower Volga River
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The plague then spread through to southern Russia
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Another ship carried the plague over and rapidly spread
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12 ships from Genoa carried the plague to Sicily in Italy
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The plague was spread to Constaninople by rats on ships
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Fleas were carried by people who were from Asia who were traveling along the trading routes all the way to Italy and then Greece
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It then spread to Egypt because of people trading from Constantinople
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Rats started to get infected by fleas and started biting people in Britain and Ireland
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The plague spread to Venice by more Genoese ships carrying flea infested rats
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The plague slowly started to spread to Northern Europe because of Genoese traders
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It was thought that the plague spread to Mecca because of infected pilgrims during the Haji celebration
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In 1351 the plague travelled all the way to Yemen
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The plague spread all the way to Moscow and by the time this happened 50 million people had died including around half of Europes population at the time