Bubonic Plague affected China, India, Europe, the Near East and Asia.
The people that had the Bubonic Plague usually died within a week.
When people died of the Bubonic Plague their bodies were on the floor for too long which may have helped the disease to spread.
Doctors tried to cure it by cutting people's arms, so it can release the "bad blood".
The Bubonic Plague contributed to the decline of feudalism by sweeping over Europe and wiped out a third of its population, it also dismantled Feudalism.
Serfs were free to leave the lands of lords to seek higher wages with the vast labour shortages. Peasants obtained power by growing crops and plants. They maintained power by getting the Bubonic Plague.