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Harmful effects include fever, chills, vomiting, etc. (see to right), plague-boils, and death.

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Swellings started occurring in armpits and/or groin, and swelled to the size of an apple. Blood and pus seeped out, and fever, chills, vomiting, diarrhea, and horrible aches and pains were other nasty symptoms.

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Black Plague Extinction Video - Black Death - HISTORY.com

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At the height of the plague, a ravaged population dug hundreds of graves every day to accommodate the dead.

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In Europe, (where the virus was introduced from the middle-east) yersinia pestis killed 75 million people, including one-third of Europe's population.

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The virus could pass through inhalation of air carrying the virus, rat bite (from rats carrying yersinia pestis), "Even the mere touching of clothes" could pass the virus.

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This plague, caused by the virus yersinia pestis, was transmitted through a species of flea called the oriental rat flea.

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The Black Death was a devastating global epidemic of bubonic plague that struck Europe and Asia in the mid-1300s. Explore the facts of the plague, the symptoms it caused and how millions died from it.

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Even before the "Death Ships" arrived in Europe, it was introduced in the Middle East, but the ships brought it to Europe, where it spread rapidly.

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In this video, basic information about viruses will be introduced. Topics will range from what defines a virus to why they are not considered living to their basic structures and various classifications.

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Perfectly healthy people (in some cases) could go to bed one night (not knowing they had been infected with the Black Death) and be dead the next morning.

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Many scholars think that "Ring Around the Rosy" was written about symptoms of the Black Death.