POLIO IMMUNIZATION.
D002648:Child; D006801:Humans; D007109:Immunity; D007114:Immunization; D007223:Infant; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
CHILD; IMMUNITY; IMMUNIZATION; INFANT; POLIOMYELITIS; POLIOVIRUS VACCINE; POLIOVIRUS VACCINE, ORAL