1976 Philadelphia Legionnaires' disease outbreak failed. The disease was finally produced in guinea pigs. The CDC announced the discovery at a press conference on January 18, 1977. The bacterium was later named "Legionella pneumophila". "Legionella pneumophila" is the most common cause, but sometimes other species of Legionella bacteria also cause Legionnaires' disease. The terms "Philadelphia fever" and "Legion fever" appear to have been used at the time of the outbreak and for shortly thereafter, although at least one 2008 source which covers disease in a historical narrative sense also included "Legion Fever" as alternate name. Both the World Health Organization in 2018 and the United
American Legion Nation. In addition to Boys State, The American Legion features numerous programs including American Legion Baseball, Scouting, Oratorical Contests, Junior Shooting Sports, Youth Alumni, Sons of the American Legion, American Legion Riders, and Scholarships at every level of the organization. The organization's official publication in its initial phase was a magazine called "The American Legion Weekly," launched on July 4, 1919. This publication switched its frequency and renamed itself "The American Legion Monthly" in 1926. In 1936 the publication's name and volume numbering system changed again, this time to "American Legion Magazine." The main American Legion Headquarters is located on