1. World Health Organization (WHO). Meeting of the strategic advisory group of experts on immunization, April 2013—conclusions and recommendations. Wkly Epidemiol Rec. 2013;88(20):201–216. Available at: [accessed November 11, 2016].
2. The new polio eradication end game: rationale and supporting evidence;Sutter;J Infect Dis,2014
3. Immunization Systems Management Group of the Global Polio Eradication Initiative. Introduction of inactivated poliovirus vaccine and switch from trivalent to bivalent oral poliovirus vaccine—worldwide, 2013–2016. Morb Mortal Wkly Rep 2015;64(25):699–702.
4. Oliver Wyman, Inc. Global Post-eradication IPV Supply and Demand Assessment: Integrated Findings; 2009. Available at: [accessed March 16, 2016].
5. United Nations Children’s Emergency Fund (UNICEF). Inactivated Polio Vaccine: Supply Update. May 2015. Available at: [accessed March 16, 2016].