Fig. 4From: The differential impact of oral poliovirus vaccine formulation choices on serotype-specific population immunity to poliovirus transmissionNet reproduction number (Rn) for OPV of each serotype for different SIA vaccine choices in 165 subpopulations affected by tOPV intensification in the global model [21] . a Comparison of Rns at time of OPV2 cessation on April 1, 2016. b Comparison of Rns at time of hypothetical OPV123 cessation on April 1, 2019Back to article page