Exploring alternative narratives: the prioritisation of polio in northern Nigeria

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The Lancet Global Health
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Vol. 2, No. 6, e317, June 2014

Tara Mangal and colleagues present compelling evidence that lends support to the suggestion that the efficacy of the oral poliovirus vaccine varies depending on its composition, thus reinforcing similar findings reported by Jenkins and colleagues in 2008. However, the persistence of polio in the northern states of Nigeria cannot be adequately explained by the chemical properties of the vaccine and therefore warrants further exploration.