Using the Academic Search Premier, I found an article that addresses some issues with current methods of eradicating polio from the world by using OPV.

The link to the source

“Moreover, the possibility of vaccination with OPV causing VAPP, cVDPV and iVDPV leads to what is called the “OPV paradox”: OPV is necessary to eradicate the virus, but as long as OPV is in use, eradication cannot be achieved [12]. The majority of high-income countries and an increasing number of middle-income countries have switched to the use of full IPV or IPV–OPV sequential immunization schedules to avoid the risks of VAPP [13]. However, for developing countries, IPV use is not recommended in the WHO position paper published in 2003 [6]. The reason for this position was the insufficient data available on IPV effectiveness and logistical implications, preventing fully informed long-term policy decisions on the introduction of IPV for routine immunization in tropical developing countries [7]. A supplement to the WHO position paper from 2006 states that the continued routine use of OPV is ultimately incompatible with eradication of polio”

Although my other post supported the argument that Polio eradication is indeed achievable, this new information suggests the contrary. With the current means of immunization, OPV, global eradication of Polio is not achievable. It is likely that a mutated form of the virus, immune to antibodies, will infect the recipient of the OPV and spread that mutant strain.