[Isolation of type I polio virus from cases of acute anterior poliomyelitis during the summer-fall outbreak of the Umbrian endemia, in 1959].
D004196:Disease Outbreaks; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology*; D011052:Poliomyelitis, Bulbar; D017955:Poliovirus
POLIOMYELITIS/epidemiology