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Detailed explanation-1: -In the Chinese region of Inner Mongolia, a city is on high alert. On Tuesday, they confirmed a case of a disease that has persisted centuries after it caused the most deadly pandemic in human history – the bubonic plague.

Detailed explanation-2: -Plague epidemics have occurred in Africa, Asia, and South America; but since the 1990s, most human cases have occurred in Africa. The three most endemic countries are the Democratic Republic of Congo, Madagascar, and Peru.

Detailed explanation-3: -What is the bubonic plague? Plague is an infectious disease caused by a specific type of bacterium called Yersinia pestis. Y. pestis can affect humans and animals and is spread mainly by fleas.

Detailed explanation-4: -In July 2020, in Bayannur, Inner Mongolia of China, a human case of bubonic plague was reported. Officials responded by activating a city-wide plague-prevention system for the remainder of the year. Also in July 2020, in Mongolia, a teenager died from bubonic plague after consuming infected marmot meat.

Detailed explanation-5: -The last urban plague epidemic in the United States occurred in Los Angeles from 1924 through 1925. Plague then spread from urban rats to rural rodent species, and became entrenched in many areas of the western United States.