title: Legionnaires' disease legacies.
mesh_terms: D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human / Q000266:history / Q000517:prevention & control; D007877:Legionnaires' Disease / Q000266:history*; D014481:United States; D014611:Vaccination / Q000009:adverse effects / Q000266:history*