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The Black Death refers to a devastating pandemic that occurred in the 14th century, resulting in the widespread death of millions of people. It was caused by the bacterium Yersinia pestis and transmitted through fleas on rats.
A specific form of the Black Death caused by the bacterium Yersinia pestis, characterized by painful swollen lymph nodes called buboes.
Pandemic: An outbreak of a disease that affects large numbers of people across multiple countries or continents.
Mortality Rate: The measure of how many deaths occur within a specific population due to a particular cause or disease.