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.
Alma is the highest town.. Montezuma, Colo., at 10,400 feet, is the second-highest town. (Contrary to some reports, Alma and Montezuma are both incorporated.) This situation gets complicated because there is no set standard to exactly where in a town an elevation is measured.