Legionnaires' Disease Outbreak in Philadelphia and the 1976 United States Presidential Election

Abstract

In the summer of 1976, prior to the United States presidential election between Gerald Ford and Jimmy Carter, an outbreak of Legionnaires' disease occurred in Philadelphia. After an epidemiological survey, 221 people with pneumonia or similar symptoms were identified, 34 of whom died. The outbreak prompted the advancement of legislation to exempt companies that produced influenza vaccines from liability for damages, resulting in significant losses for the government. The outbreak was a major economic blow to the Bellevue Stratford Hotel, an iconic historical hotel in Philadelphia, which was forced to close 16 days after the election. Following the outbreak, media coverage was extensive, and there was frustration over the inability to determine the cause of the outbreak in Philadelphia. The critical factor was that the cause of the outbreak was not determined to be rod-shaped bacteria, later named Legionella pneumophila, before the election date. While many aspects had an impact, it is possible that the Legionnaires' disease outbreak may have affected the outcome of the election, particularly in Pennsylvania. This study does not make definitive causal links but focuses on Legionnaires' disease and the 1976 elections.