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.
Oxygen on Everestâs First Summit. In the 1950âs when the Swiss and British restarted attempts on Everest, the technology had advanced based on two World Wars. In 1953, almost thirty years after the first attempts, Sir Edmund Hillary and Tenzing Norgay reached the summit with a much improved and lighter (22 lb/10 kg) system.