. "1976 Philadelphia Legionnaires' disease outbreak" . . . . "an outbreak in 1976" . . . . . . "180 Legionnaires contract pneumonia-like symptoms" . . . "1976 Legionnaires' outbreak in Philadelphia" . . "the outbreak where it was first identified" . "killed 29 people and sickened 182 more who had been in the hotel" . . . "Legionnaires' Disease outbreak" . . . . "1976 Philadelphia Legionnaires' disease outbreak" . "outbreak" .