The medieval Silk Road brought a wealth of goods, spices, and new ideas from China and Central Asia to Europe. In 1346, the trade also likely carried the deadly black plague that killed as many as half of all Europeans within 7 years, in what is known as the Black Death. Black plague is an infection spread mostly to humans by infected fleas that travel on rodents. Called the Black Death, it killed millions of Europeans during the Middle Ages. Prevention doesn't include a vaccine, but does involve reducing your exposure to mice, rats, squirrels and other animals that may be infected. Black plague symptoms and signs include painful and enlarged or swollen lymph nodes (an enlarged lymph node due to plague is called a bubo), chills, headache, fever, fatigue, and weakness. The effects of the Black Death were many and varied. Trade suffered for a time, and wars were temporarily abandoned. Many laborers died, which devastated families through lost means of survival and caused personal suffering; landowners who used laborers as tenant farmers were also affected.
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