title: [Selection of virulent poliovirus strains in developing countries? A hypothesis].
mesh_terms: D004196:Disease Outbreaks; D006801:Humans; D007630:Kenya; D011051:Poliomyelitis / Q000453:epidemiology; D017955:Poliovirus / Q000472:pathogenicity; D012641:Selection, Genetic; D014774:Virulence
vernacular_title: Worden in ontwikkelingslanden virulente poliovirusstammen geselecteerd? Een hypothese