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The Black Death is thought to have originated in the arid plains of Central Asia, where it then travelled along the Silk Road, reaching Crimea by 1343. From there, it was most likely carried by Oriental rat fleas living on the black rats that were regular passengers on merchant ships. Spreading throughout the Mediterranean and Europe, the Black Death is estimated to have killed 3060% of Europe's total population. In total, the plague reduced the world population from an estimated 450 million down to 350375 million in the 14th century. The world population as a whole did not recover to pre-plague levels until the 17th century. The plague recurred occasionally in Europe until the 19th century.

The plague disease, caused by Yersinia pestis, is enzootic (commonly present) in populations of fleas carried by ground rodents, including marmots, in various areas including Central Asia, Kurdistan, Western Asia, Northern India and Uganda. Nestorian graves dating to 133839 near Lake Issyk Kul in Kyrgyzstan have inscriptions referring to plague and are thought by many epidemiologists to mark the outbreak of the epidemic, from which it could easily have spread to China and India. In October 2010, medical geneticists suggested that all three of the great waves of the plague originated in China. In China, the 13th century Mongol conquest caused a decline in farming and trading. However, economic recovery had been observed at the beginning of the 14th century. In the 1330s a large number of natural disasters and plagues led to widespread famine, starting in 1331, with a deadly plague arriving soon after. Epidemics that may have included plague killed an estimated 25 million Chinese and other Asians during the 15 years before it reached Constantinople in 1347.

1. How much of Europe's population was killed by the Black Death?
2. What is the bacterium that caused it?
3. Where is it often found?
4. where do the fleas live?
5. How did it get to Europe?
6. What do many scientists believe was the start of the plague?
7. how many people died before the disease came to Turkey?
8. When did the population rebound?
9. Were there any more outbreaks?
10. when did they stop?
1. 3060%
2. Yersinia pestis
3. In flea populations?
4. In Central Asia
5. From fleas on merchant ships
6. A plague in China
7. unknown
8. 17th century.
9. Yes
10. 19th century.