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What are the three serotypes of wild poliovirus?
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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 PV3.1
While PV1 remains the most widespread serotype, both PV2 and PV3 have been eradicated. These serotypes are the targets of polio vaccines, which are essential for maintaining global immunity and preventing the spread of this infectious disease.12