Molecular studies identified the presence of the Y. pestis plague DNA genome in two Bronze Age skeletons dated at roughly 3800 years old. Scholars have also identified three plague pandemics. 

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Plagues are a disease that affects humans and other mammals. It is caused by the bacterium, *Yersinia pestis*. Humans usually get the plague after being bitten by a rodent flea that is carrying the plague bacterium or by handling an animal infected with the plague.

Plague

- U. S. History
- European History
- Modern History
- Military History
- Ancient History

Subcategories of History

NIH. (2022). National Library of Medicine. National Center for Biotechnology Information. Retrieved July 16, 2022, from https://www.ncbi.nlm.nih.gov/ 

National Library of Medicine (NIH) 

References for Plague Histories 

*Yersinia pestis* has 15 virulence factors, including 8 involved in adhering to host cells, a F1 capsule to avoid phagocytosis, and several to disseminate into the bloodstream.

Virulence Factors of *Yersinia pestis*

- Bubonic plague 
- Pneumonic plague
- Septicemic plague

Forms of the Plague

How do humans typically contract the plague?

What bacterium is responsible for causing the plague?

Which of the following animals is most likely to be involved in the transmission of the plague to humans?

Which of the following best describes the primary way the plague bacterium *Yersinia pestis* is transmitted to humans?

Modern history deals with world history since the Middle Ages. Generally, it refers to world history since the beginning of the Age of Reason, the Age of Enlightenment, and the Industrial Revolution, in the 17th and 18th centuries.

Modern History

Military history deals with the history of armed conflict over the course of human history, as well as its impact on the relevant economies, societies, and cultures, plus the corresponding changes to local and international relationships.

Military History

European history deals with the discovery, collection, study, organization, presentation, and interpretation of the affairs and events of the European nations and peoples since since written records began. 

European History

U. S. history deals with the history of the United States since its founding, as well as all the events that led to the founding of the United States. The beginnings of U. S. history can be traced back to the arrival of the first Native Americans in ~15000 B. C. The arrival of Christoper Columbus in 1492 A. D. led to permanent European colonization of the Americas. 

U. S. History

Ancient History is past events starting from writing/recorded human history to late antiquity. Ancient history is a period of time or academic category. 

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