OPV and Rotavirus - Is There a Mouse Model?

The WHO is using bivalent now type one and three because two has been eradicated, correct? Actually, two and three have been eradicated,. But two is a declared eradicated five years ago. And so they stopped putting OPV two in the vaccine. Now we have vaccine derived type two outbreak more than polio. We had more cases of type two polio from the vaccine last year than wild polio.