Although only about one person in ten with a positive skin test or blood assay ever develops. TB disease, the risk continues throughout the rest of your life. The symptoms of TB are. common to many other illnesses.
Marco Polo-Great Silk Road. For many centuries the Great Silk Road connected a complex network of trade routes from Europe with Asia. It was a way to establish contact with the great civilizations of China, India, the Near East and Europe.
Marco Polo was born in 1254, in Venice, Italy. He traveled extensively with his family, journeying from Europe to Asia from 1271 to 1295. He remained in China for 17 of those years. Around 1292, he left China, acting as consort along the way to a Mongol princess who was being sent to Persia.