In this case it likely is, as effect is not on the person taking the vaccine, OPV doses can spread VDPV to other un-vaccinated people near them. There shouldn'

In this case it likely is, as effect is not on the person taking the vaccine, OPV doses can spread VDPV to other un-vaccinated people near them. There shouldn't have any impact on number of vaccine derived polio cases unless viral loads differ etc between doses.