GLOBAL POLIO ERADICATION INITIATIVE
After many months of planning and coordination, it was officially confirmed in June that all of the 155 countries undergoing the global switch from the trivalent to bivalent oral polio vaccine (OPV) were successful. This means that the type 2 component of OPV has been removed from use. With this milestone complete, there are important risk mitigation measures that must be finalized, including outbreak preparedness and response plans for isolates of type 2 vaccine-derived polioviruses; a global stockpile of type 2 monovalent OPV; and containment measures for handling type 2 viruses in vaccine facilities or laboratories.
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