Fig. 6From: Planning for globally coordinated cessation of bivalent oral poliovirus vaccine: risks of non-synchronous cessation and unauthorized oral poliovirus vaccine useSerotype 1 risks of unauthorized bOPV use for different scenarios. Minimum duration after bOPV cessation until unauthorized bOPV use leads to a serotype 1 cVDPV outbreak as a function of the extent of unauthorized use for the base case and alternative scenarios (analysis IV). Unauthorized post-cessation RI bOPV use proportion represents the proportion of covered children who receive a single dose of bOPV instead of the scheduled IPV dose. a Population with properties like northern India. b Population with properties like northern NigeriaBack to article page