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b'Between 1347 and 1450 AD, bubonic plague overran Europe, killing some 75 million people. The plague, dubbed the Black Death because of the black pustules that erupted on the skin of the afflicted, was caused by a bacterium now known as Yersinia pestis. The Europeans of the day, lacking access to microscopes or knowledge of [\\u2026]\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'