Tuberculosis (TB) Tuberculosis (TB) Active tuberculosis (TB) is very contagious. The World Health Organization (WHO) estimates that one-third of the world's population is infected with the bacteria that cause TB.
With an average elevation of 6,800 feet, Colorado is the highest state in the United States. A mountain lake outside of the skiers dreamland of Aspen, Colorado. The US is bordered to the north by Canada and Mexico to the South. With 50 states of varied sizes, US is considered the largest nation in America.
Mt. McKinley (also called Denali) is 20,320 ft (6,194 m) in elevation. It is considered the highest mountain in the U.S. Mauna Kea (The Big Island), Hawaii is not only the talâ¦lest mountain in the US but the tallest in the world at over 10,000 m. (33.000 ft.) from base to summit. However most of it is under water.