Continuing global poliomyelitis morbidity and lacunae of trivalent poliovirus vaccines.
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D003906:Developing Countries; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology*; D011055:Poliovirus Vaccine, Oral / Q000276:immunology*; D013696:Temperature
D011055:Poliovirus Vaccine, Oral