Transmission of Neurosyphilis from Person to Person. Neurosyphilis is considered infectious but is not transmitted from person to person. Generally, a disease like this is caused by an infectious agent and not spread between people.
On May 29, 1953, Edmund Hillary and Tenzing Norgay completed the first confirmed ascent of Mount Everest, which stands 29,035 feet above sea level.
In 1960, a Chinese expedition was the first to conquer the mountain from the Tibetan side, and in 1963 James Whittaker became the first American to top Everest. In 1975, Tabei Junko of Japan became the first woman to reach the summit. Three years later, Reinhold Messner of Italy and Peter Habeler of Austria achieved what had been previously thought impossible: climbing to the Everest summit without oxygen. Nearly two hundred climbers have died attempting to summit the mountain.