2 years ago
Last edited at 9:11PM on 4/29/2011
In the 14th century in Europe, the Black (or the Bubonic) Plague killed about half of the European population. It was caused by rats who were carrying fleas which carried the bacteria that causes the bubonic plague. If they had antibiotics back then, people would have been saved. It's generally believed that this bacteria came from the far east and got to Europe on merchant ships which had cargo from the east. The disease gradually "petered out" after so many people died of it. I believe the only modern cases of black plague have occured in India.