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. Marco Polo was an Italian merchant and explorer, famous for introducing Europeans to China and Central Asia. He inspired future travelers, including Christopher Columbus. Born presumably in the Republic of Venice around 1254, Marco Polo played an important role in cartography.