Sabin vaccine and breast-fed babies.
D001942:Breast Feeding; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D007231:Infant, Newborn; D011051:Poliomyelitis / Q000276:immunology; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage*; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral