Epidemic of echovirus type 9 infection. Certain clinical and epidemiologic features.
D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology*; D004457:Echovirus Infections / Q000453:epidemiology*; D029822:Enterovirus B, Human / Q000302:isolation & purification; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008587:Meningitis, Viral / Q000453:epidemiology*; D009518:New York