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The black death was a specific outbreak of diseases caused by the bacterium Yersinia pestis, in 1347 to about 1352 in Europe. Historically, there has been some question about this, with some scholars suggesting different organisms being the cause, but modern forensics seem to support Yersinia pestis as the cause.

There are three manifestation of disease, referred to as the Bubonic Plague, the septicemic plague, and the pneumonic plague. Most usually, the disease is bubonic, referring to the buboes or very swollen lymph nodes present. If the disease gets into the blood system, it becomes septicemic, and is very much more likely to be fatal. The pneumonic manifestation happens when the disease gets into the lungs, and in this form it can be spread by the droplets a person coughs up into the air, with the new victims getting it first in the lungs.

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13y ago

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