Legionnaires' disease that occur globally is not known. Legionnaires' disease is the cause of an estimated 2-9% of pneumonia cases that are acquired outside of hospital. An estimated 8,000 to 18,000 cases a year in the United States require hospitalization. Outbreaks of disease account for a minority of cases. While it can occur any time of the year, it is more common in the summer and fall. The disease is named after the outbreak where it was first identified, at a 1976 American Legion convention in Philadelphia. The length of time between exposure to the bacteria and the appearance of symptoms is
History of the Irish Americans in Philadelphia History of the Irish Americans in Philadelphia People of Irish descent form the largest ethnic group in the city of Philadelphia and its surrounding counties. The Irish have lived in Philadelphia since the pre-American Revolution period. Irishmen had participated in pro-Revolutionary activities in Philadelphia during the Revolutionary War. Like many American cities in the 19th century, Philadelphia, which was once a Quaker stronghold, changed dramatically with the influx of European immigrants. The first major influx of Irish came in 1844 from rural areas, spurred by the Irish Famine. Because of the Quakers belief and pledge of religious tolerance, Irish Catholics