Water-related disease outbreaks, 1985.
D003967:Diarrhea / Q000453:epidemiology; D004196:Disease Outbreaks; D005873:Giardiasis / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D011159:Population Surveillance; D011998:Recreation; D012621:Seasons; D012767:Ships; D013551:Swimming Pools; D014481:United States; D014876:Water Pollution / Q000009:adverse effects*; D014881:Water Supply