[Effect of oral poliovirus vaccine in premature infants and children].
D000917:Antibody Formation; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*
D011054:Poliovirus Vaccine, Inactivated