The distribution of poliomyelitis and ECHO viruses in a children's institution.
D002648:Child; D029822:Enterovirus B, Human; D005190:Family; D006268:Health Facilities; D006801:Humans; D011051:Poliomyelitis; D017955:Poliovirus; D014780:Viruses
POLIOMYELITIS VIRUS; VIRUSES