[Frequency of three types of poliomyelitis virus as causative agents of paralytic disease in the Province of Milan in 1956].
D006801:Humans; D011051:Poliomyelitis; D017955:Poliovirus
POLIOMYELITIS VIRUS
Frequenza dei tre tipi di virus poliomielitico come agenti causali di malattia paralitica in Provincia di Milano nel 1956.