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 emerges as being curious and tolerant, and devoted to Kublai Khan and the dynasty that he served for two decades. The book is Polo's account of his travels to China, which he calls Cathay (north China) and Manji (south China). The Polo party left Venice in 1271.