WHO Briefing Note on preparing for the withdrawal of all oral polio vaccines (OPVs).

1. Rationale for OPV withdrawal. 2. Timelines for switching from tOPV to bOPV. 3. Programmatic implications of the switch

Frequently Asked Questions on replacing trivalent OPV with bivalent OPV.

We are close to the eradication of polio, with a new global endgame plan leading the way to a polio-free world. In the last two decades, immunization efforts have reduced the number of polio cases globally by more than 99%. Of the three poliovirus t...

The oral polio vaccine (OPV) is an extremely safe and effective tool for immunizing children against polio. Over the past 10 years, more than 10 billion doses of OPV have been administered to over 2.5 billion children worldwide, preventing more than...