Key Terms from the Text

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Black Death

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A devastating global epidemic of bubonic plague that struck Europe and Asia in the mid-1300s.

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Plague

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A contagious bacterial disease characterized by fever and delirium, typically with the formation of buboes.

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Outbreak

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A sudden occurrence of something unwelcome, such as a disease.

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Harbor

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To give shelter or refuge to, especially in the context of bacteria or disease.

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Bacteria

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Microscopic single-celled organisms that can be beneficial or cause diseases.

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Adapt

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To adjust or modify to suit a new environment or conditions.

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Coexist

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To exist together, at the same time, or in the same place.

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Ectoparasite

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A parasite, such as a flea, that lives on the outside of its host.

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Exonerate

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To clear from accusation or blame.

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Epidemic

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A widespread occurrence of an infectious disease in a community at a particular time.