The reaction the Mongols took to prevent the out break-off disease was to cut off the trade routes like the Silk road
Explanation:
This is the type of plague which was carried by the fleas and he black rats through the trade from the Asian countries. This disease killed almost 200 million of the world population in the 13th century.
Bubonic plague was also called as the Black Death because it made the affected persons skin to turn black. The disease spread through the ships which brought grains from the Mediterranean Sea to the Europe. Some part of the world such as Poland, Finland and the western parts of Russia remained unaffected by the disease.