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
Polish Legion of American Veterans U.S. military veterans after World War I. Its lineage begins with the Alliance of Polish-American Veterans, created in the summer of 1920 after a gathering of veterans from Illinois, Ohio, and Wisconsin in Hawthorne, Illinois. In December 1920, this association held a provisional convention and in September 1921 it held its first regular convention, at which they changed their name to the "Alliance of American Veterans of Polish Extraction." In September 1931 the Alliance of American Veterans of Polish Extraction merged with the Polish Legion of the American Army and a veteran's organization from Michigan to form the PLAV. On