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Plaque, particularly the Bubonic Plague, was primarily spread through fleas that infested rats, which were common on trade ships and in urban areas. When infected fleas bit humans, the bacteria Yersinia pestis entered the bloodstream, leading to infection. Additionally, the disease could also spread through respiratory droplets from an infected person or through contact with contaminated materials. Poor sanitation and crowded living conditions further facilitated the rapid transmission of the disease during outbreaks.

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1mo ago

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