proponents have accepted the safety of the modern polio vaccines, but rumors based on a misunderstanding of the hypothesis exist, and those rumors are blamed in part for the recent failure to eliminate polio in nigeria. by 2003, cases of poliomyelitis had been reduced to just a small number in isolated regions of west africa, with sporadic cases elsewhere. however, the disease has since resurged in nigeria and in several other nations of africa, which epidemiologists trace to refusals by certain local populations to allow their children to be administered the sabin oral vaccine. the expressed concerns of local populations often relate to fears that the vaccine might induce sterility, and it seems that debate over the opv aids hypothesis has fueled additional fears. since 2003, these fears have spread among some in the muslim community, with datti ahmed, of the supreme council for sharia in nigeria stating that: we believe that modern-day hitlers have deliberately adulterated the oral polio vaccines with anti-fertility drugs and viruses which are known to cause hiv and aids. as evidence to the success of polio eradication efforts, the vaccine-derived polioviruses (cvdpvs) nowadays cause more cases of polio paralysis than the wild type virus itself in many places, such as the congo. polio has also resurged in areas of pakistan, india and bangladesh.