What kind of sickness is the black plague?

The Black Plague is a bacterial disease caused by the bacterium _Yersinia pestis_. It is usually transmitted by the bites of infected fleas that live on wild animals, such as rats. The Black Plague is a serious infection that can cause fever, chills, swelling of the lymph nodes, and skin sores. If not treated promptly, the Black Plague can be fatal.

There are three main types of the Black Plague: bubonic, septicemic, and pneumonic.

* Bubonic plague is the most common form of the Black Plague. It is characterized by the swelling of the lymph nodes, called buboes. Bubonic plague can spread to the bloodstream, causing septicemic plague.

* Septicemic plague occurs when the bacteria enter the bloodstream. It can cause fever, chills, and skin sores. Septicemic plague can be fatal if not treated promptly.

* Pneumonic plague occurs when the bacteria infect the lungs. It can cause fever, chills, cough, and shortness of breath. Pneumonic plague is the most contagious form of the Black Plague and can be spread through respiratory droplets.

The Black Plague was responsible for the deaths of millions of people in Europe during the Middle Ages. It is estimated that the Black Plague killed between 30 and 60 percent of Europe's population. The Black Plague has also caused pandemics in other parts of the world, including Asia and Africa.

The Black Plague is still a threat today, although it is not as common as it was in the past. There is a vaccine available to prevent the Black Plague, and antibiotics can be used to treat the infection.