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.
Leadville is the highest city. The towns of Montezuma at 10,335 feet (3150 m), Alma at 10,355 feet (3156 m) are higher. Breckenridge, Colorado is at 9600 ft (2926 metres). Silverton, Colorado (9314 feet (2839 m) The town limits of Winter Park (9052 feet (2759 m)) extend to 12,060 feet (3676 m).