title: [Present state of the poliomyelitis problem on the American hemisphere].
authors.forename: W
authors.initials: W
authors.lastname: HAMMON
mesh_terms: D005006:Ethnicity; D006801:Humans; D011051:Poliomyelitis; D014481:United States
keywords: POLIOMYELITIS
vernacular_title: La situación actual del problema de la poliomielitis en el continente americano.