1. Poliomyelitis eradication;Dowdle;Virus Res,1999
2. Global polio eradication initiative strategic plan 2004–2008;WHO, World Health Organisation,2003
3. The role of routine polio immunization in the post-certification era;Sutter;Bull World Health Organ,2004
4. WHO global action plan for laboratory containment of wild poliovirus;WHO, World Health Organisation,2003
5. Antigenic and immunogenic properties of inactivated polio vaccine made from Sabin strains;Kersten;Vaccine,1999