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Which poliovirus serotypes have been eradicated?
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polio
A health care worker giving a polio vaccine to a child in Katsina state, Nigeria, 2014.
There are three known serotypes of wild poliovirus: PV1, PV2, and PV3. Of these, both PV2 and PV3 have been eradicated globally. PV1 remains the most widespread serotype and continues to circulate in the few remaining regions where the disease is endemic.12