What caused the Black Plague to cease?

There is no one definitive answer to the question of what caused the Black Plague to cease. However, there are a number of factors that are thought to have contributed to its decline, including:

* Improvements in hygiene and sanitation. In the early 14th century, people in Europe began to take more steps to improve hygiene and sanitation. These steps included washing their hands more frequently, using soap, and cleaning their homes and streets more regularly. These measures helped to reduce the transmission of the plague bacillus.

* The development of immunity. Over time, people who survived the plague developed immunity to it. This immunity helped to protect them from future outbreaks of the disease.

* The decline of the rat population. The plague bacillus is carried by rats, so the decline of the rat population helped to reduce the transmission of the disease. The decline in the rat population may have been caused by a number of factors, including the use of rat poison and the spread of cats.

* Changes in climate. Some historians believe that changes in climate may have also played a role in the decline of the Black Plague. The plague bacillus thrives in warm, humid conditions. However, during the 14th century, Europe experienced a period of cooler, drier weather. These conditions were less favourable to the plague bacillus, and may have helped to slow its spread.

It is important to note that the Black Plague did not disappear completely after the 14th century. It continued to erupt in outbreaks throughout Europe and Asia for several hundred years. However, the outbreaks were never as severe as the initial pandemic, and the disease eventually became much less common.