legionnaires-diseaseCertainly the past 18 months or so have made us all aware of the complexity of disease outbreak called epidemiology, “the study and analysis of the distribution, patterns and determinants of health and disease conditions in defined populations.” Back in 1976 there was another outbreak of limited scope, but one that became well know as Legionnaires’ Disease. If you would like to read a longish article on the event,the complexity and perplexity of identifying the disease, its cause, and its propagation – long but fascinating – have a look here.