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The Water Supply of Williamson West Virginia and Its Rela
A Milkborne Outbreak in Baltimore Mary
Epidemiologic Studies of Acute Anterior Poliomyelitis
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acute adults age group Association attack rate bacillus bacteriological Baltimore carriers cent Cerro Gordo County cholera clinical considerable contact with previous coryza dairy death rate definite diagnosis diphtheria Direct contact distribution endemic epidemic epidemiological evidence factors facts families fatality febrile females frequency Frost Grundy County Hygiene illness incidence included indicated infectious diseases influenza investigation Iowa July June less males Mason City microorganism months morbidity mortality myelitis November observed obtained occurred onset outbreak paralysis pasteurization patients percentage period persons pneumonia polio poliomyelitis pollution population present prevalence previous paralyzed probable proportion Public Health Reports Public Health Service purification ratio records result sanitary scarlet fever Schick Schick test septic sore throat serum sewage sore throat source of infection statistics suspected abortive Sydenstricker symptoms TABLE theria tion Total town tuberculosis Tug River typhoid fever virulence virus water supply weeks Williamson