Eradicating Polio

Abstract

During the past 12 months, poliovirus has been spreading to states in Nigeria that were previously free of poliomyelitis. Moreover, global surveillance for acute flaccid paralysis1 — involving the genomic sequencing of each wild poliovirus that is detected — has demonstrated that wild poliovirus genetically linked to parent viruses in northern Nigeria has spread to 12 other previously polio-free countries in sub-Saharan Africa.Rumors of “contaminated” polio vaccine ignited a controversy in Kano State, in northern Nigeria, in mid-2003 and led to the immediate and official suspension of immunization activities. Such rumors — the substance of which varies from the . . .

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