The US still vaccinates against polio, but we don’t use the OPV anymore: https://www.cdc.gov/vaccines/vpd/polio/index.html
The OPV is still used in the few countries where there is polio in the wild because it does have advantages over the IPV.
The OPV is still used in the few countries where there is polio in the wild because it does have advantages over the IPV.