| a community outbreak of legionnaires' disease linked to hospital cooling towers: an epidemiological method to calculate dose of exposure. | from july to september 1994, 29 cases of community-acquired legionnaires' disease (ld) were reported in delaware. the authors conducted an investigation to a) identify the source of the outbreak and risk factors for developing legionella pneumophila serogroup 1 (lp-1) pneumonia and b) evaluate the risk associated with the components of cumulative exposure to the source (i.e. distance from the source, frequency of exposure, and duration of exposure). | 1999 | 10342703 |