title: U.S. cases in 1968: epidemiology of echovirus 30 aseptic meningitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D004457:Echovirus Infections / Q000097:blood / Q000134:cerebrospinal fluid / Q000453:epidemiology* / Q000382:microbiology; D029822:Enterovirus B, Human / Q000302:isolation & purification; D006801:Humans; D007223:Infant; D007958:Leukocyte Count; D008581:Meningitis / Q000097:blood / Q000134:cerebrospinal fluid / Q000453:epidemiology* / Q000209:etiology / Q000382:microbiology; D008875:Middle Aged; D014481:United States