Proportions of seroconversion to type-1 poliovirus were 107/135 ( 79 % , 95 % CI 724-861 ) with mOPV1-1 week , 108/135 ( 80 % , 732-868 ) with mOPV1-2 weeks , 129/148 ( 87 % , 809-920 ) with mOPV1-4 weeks , and 107/136 ( 79 % , 718-856 ) with bOPV-4 weeks .