Purity. Flushing out disease.
Wilson
Chris
C
D002771:Cholera / Q000209:etiology / Q000517:prevention & control; D006801:Humans; D014435:Typhoid Fever / Q000209:etiology / Q000517:prevention & control; D014481:United States; D014504:Urban Health; D014871:Water Microbiology; D018508:Water Purification