title: Polio immunisation: not there yet.
authors.forename: I
authors.initials: I
authors.lastname: van der Linde
mesh_terms: D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011051:Poliomyelitis / Q000517:prevention & control*; D015397:Program Evaluation; D013019:South Africa; D014611:Vaccination