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.
It was Marco Polo's father who first traveled the famous China's Silk Road. A couple of years after the original trip, Polo joined his father on a repeat trip to see Kublai Khan. What had been originally planned as a short visit turned into a 17-year residency in the Chinese Empire.