"In 2011, there were an extra 47,500 new cases of non-polio acute flaccid paralysis. Clinically indistinguishable from polio paralysis but twice as deadly, the incidence of non-polio acute flaccid paralysis was directly proportional to doses of oral polio received. In regions where children are vaccinated multiple times, the non-polio acute flaccid paralysis rate is up to 35 times higher than international norms. The non-polio acute flaccid paralysis rate in a given year correlates to the cumulative doses of oral polio vaccine received in the previous 3 years."