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Answer:The Bubonic Plague (Black Death) developed in the middle ages. it was said to be passed on by fleas to rats on merchant ships. The rats then passed it on to the people on the ships who easily transferred it to anyone they came in contact with. All they had to do was breathe on them. The plague made areas of the human body turn black and/or purple, and about 6 million people died from it
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13y ago

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