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activities age groups antigen antitoxin bacteria cent child clinics conference contamination cooperation County Health Department County Health Unit dairymen Davidson County death rates December 18 defects definite Department of Public diphtheria Director discussion Doctor Bishop Doctor Roberts E. L. Bishop examined field full-time health Gibson County Giles County give grade health education health officer immunity important individual infant injections inoculations interest L+ T-A medicine Memphis ment Miss Nashville organization paper Parent-Teacher Association partment pasteurizing physicians prenatal preschool present problem public health nursing Public Health Service public health worker question reaction records rural health Rutherford County sanitary officer sanitary privies sanitation Schick test school children Section Shelby County Standard Milk Ordinance Sullivan County teacher Tennessee theria things tion toxin toxin-antitoxin toxoid tuberculosis typhoid fever typhoid vaccine United States Public vaccine visits West Tennessee