Contagion and contagiousness refers to how easily the spread of Neurosyphilis is possible from one person to another. Other words for contagion include infection, infectiousness, transmission or transmissability. Contagiousness has nothing to do with genetics or inheriting diseases from parents.
Tacoma was preferred in the city of Tacoma. In 1890, the United States Board on Geographic Names declared that the mountain would be known as Rainier. Following this in 1897, the Pacific Forest Reserve became the Mount Rainier Forest Reserve, and the national park was established three years later.
Relative to Mount St. Helens, Rainier is an older and taller mountain (and has more glacial volume and mass than St. Helens did even prior to its 1980 eruption), and many more people live within range of Rainier and the rivers that flow from its glaciers (susceptible to lahars and pyroclastic flows) than St. Helens.