You are completely misinformed about this. I spent quite a long time reading about this.
What you write is what they hoped would happen. However it did NOT happen. The reason is that the more you try to vaccinate the entire population, the more cases of cvdpv2 you cause. Until you hit that magic 100% you cause more harm than you prevent.
And in the real world 100% is impossible. So yes opv2 "causes more cases than it's stopping" - there are zero cases of wild type 2, so it's stopping nothing except itself.
And in fact that people running this campaign noticed this and stopped vaccinating with opv2! (Which perhaps you did not know.)
The new version of it will hopefully help, and we can eradicate this.
But right now Polio eradication is failing, not because of Taliban, but because of cvdpv2.
I have high hopes for the new version, but it'll be years before we know.
What you write is what they hoped would happen. However it did NOT happen. The reason is that the more you try to vaccinate the entire population, the more cases of cvdpv2 you cause. Until you hit that magic 100% you cause more harm than you prevent.
And in the real world 100% is impossible. So yes opv2 "causes more cases than it's stopping" - there are zero cases of wild type 2, so it's stopping nothing except itself.
And in fact that people running this campaign noticed this and stopped vaccinating with opv2! (Which perhaps you did not know.)
The new version of it will hopefully help, and we can eradicate this.
But right now Polio eradication is failing, not because of Taliban, but because of cvdpv2.
I have high hopes for the new version, but it'll be years before we know.