When you were a kid did you ever hear the song Ring around the rosie? Well, you might think it was fun to sing. But the reality is that the song was invented in the Middle Ages due to a disease called the Black Death ("Middle Ages for Children - The Plague!."). The Black Death was the most devastating disease of the Middle Ages, if not in the history of humanity. This disease kills over 75 million people, or 1/3 of the European population. This disease was actually a bacterium that lived in black rats. The way this disease spread to humans is due to fleas. The fleas bit the infected black rat and then jumped towards the human victim and bit him ("Plague"). The Black Death spread very quickly, if you were infected and coughed on someone else that person will know that they will be dying or dead by the end of the week ("Plague"). This is why the Black Death was the worst disease in human history because it spread so quickly and killed millions of people in a matter of years. In the Middle Ages, the idea that people had of the Black Death was due to religious beliefs. They believed that God sent these diseases as punishment for the sins they had committed, but also to test their faith and strength ("medical beliefs". ). The scientific belief about what caused this disease was the rotation of the planet. They believed that the way the planet moved brought in bad air and this was what made people sick and caused disease. They also believed that the cure for the Black Death was to pray to God and give charity to the poor ("medical beliefs"). In this period of the Middle Ages doctors were very important because they helped sick people, gave them cures, and also explained to people how to stop the black... in the center of the card... he believed that the scientific belief was the rotation of the planets which made the air bad and affected people's health ("medical beliefs. " ).Works cited"Middle Ages for children - The Plague!." Middle Ages for children - The Plague!. Np, nd Web. April 25, 2014. .Elliott, Lynne. "the black death." Medieval medicine and the plague. New York, NY: Crabtree Pub., 2006. . Print.Elliott, Lynne. "medical beliefs". Medieval medicine and the plague. New York, NY: Crabtree Pub., 2006. . Print.Elliott, Lynne. "Doctors." Medieval medicine and the plague. New York, NY: Crabtree Pub., 2006. . Press."Plague, Plague Information, Black Death Facts, News, Photos - National Geographic."National Geographic. Np, nd Web. April 25. 2014. .