The Black Death was primarily caused by the bubonic plague, a bacterial infection transmitted by fleas that lived on black rats.

Europe was the region hit the hardest by the Black Death, with an estimated death toll of 20 to 30 million people.

The mortality rate of the Black Death is estimated to have been between 50 and 60 percent, making it one of the deadliest pandemics in history.

Symptoms of the Black Death included swollen lymph nodes, fever, chills, and, in some cases, bleeding from the nose and mouth.

The Black Death was transmitted through the air, through contact with infected animals, and through contact with infected people.

The Black Death had a profound impact on European society, leading to widespread death and depopulation, economic disruption, and social unrest.

The Black Death led to the development of new medical treatments, new public health measures, and new hospitals, all of which contributed to the development of modern medicine.

The Black Death was caused by the bacterium Yersinia pestis.

The Black Death was transmitted by the flea Xenopsylla cheopis, which lived on black rats.

The Black Death was carried by the black rat, Rattus rattus.

The Black Death first appeared in Europe in 1347, when it arrived in Sicily on a Genoese trading ship.

The Black Death reached its peak in Europe in 1349, when it killed an estimated 20 to 30 million people.

The Black Death ended in Europe in 1351, after killing an estimated 20 to 30 million people.

Clement VI was the pope who reigned during the Black Death.

Edward III was the king of England who reigned during the Black Death.