Bubonic Plague

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…misery were the only results of superstition, because, no matter what they did or what they believed in, people were dying every day. The bubonic plague depopulated countries and emptied many cities, leaving only horror and death, that its consequences could be compared with the effect of the wars and genocide. The part of the history, when the bubonic plague appeared, is Medieval period, but it is also called a Dark Age, no wonder why.