A few month ago there was a discussion, because the Sabin vaccine use the live virus and it can escape and cause an outbreak, so you can't stop vaccination.
So the recommendation of the WHO is that after some years without cases to change to a mixed vaccination with some doses of the Sabin vaccine and the Salk vaccine.
And after a few years without cases in the country and nearby, you can change to only Salk vaccine that is safer, but more expensive and is less effective against an ongoing outbreak. So the new is that we switched to this only Salk phase.
A few month ago there was a discussion, because the Sabin vaccine use the live virus and it can escape and cause an outbreak, so you can't stop vaccination.
So the recommendation of the WHO is that after some years without cases to change to a mixed vaccination with some doses of the Sabin vaccine and the Salk vaccine.
And after a few years without cases in the country and nearby, you can change to only Salk vaccine that is safer, but more expensive and is less effective against an ongoing outbreak. So the new is that we switched to this only Salk phase.