South Africa is part of a 'pariah' group of countries that are not certified polio-free, thanks to weaknesses in our surveillance and vaccination programme.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/africa-south-africa-bids-regain-who-polio-free-certification
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/all-africa
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/polio
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-africa
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/immunisation
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/child-health