Poliovirus antibodies in breast-fed infants.
D000367:Age Factors; D000906:Antibodies / Q000032:analysis*; D001942:Breast Feeding; D006801:Humans; D007223:Infant; D008895:Milk, Human / Q000276:immunology*; D017955:Poliovirus / Q000276:immunology*; D013997:Time Factors
D000906:Antibodies