Coxsackie A7 virus and the Russian poliovirus Type 4.
D003384:Coxsackievirus Infections; D004770:Enterovirus; D030015:Enterovirus C, Human; D005006:Ethnicity; D006801:Humans; D007802:Language; D011051:Poliomyelitis; D017955:Poliovirus; D012426:Russia
COXSACKIE VIRUSES; POLIOMYELITIS VIRUS