title: Letter: Oral polio immunisation.
mesh_terms: D000914:Antibodies, Viral / Q000032:analysis; D001942:Breast Feeding; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000517:prevention & control*; D017955:Poliovirus / Q000276:immunology; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination
chemical_list: D000914:Antibodies, Viral; D011055:Poliovirus Vaccine, Oral