title: The presence of ECHO 9 antibodies in the young population of different regions in Serbia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000906:Antibodies / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D029822:Enterovirus B, Human / Q000276:immunology*; D006801:Humans; D007223:Infant; D009500:Neutralization Tests; D017955:Poliovirus / Q000276:immunology; D015022:Yugoslavia
chemical_list: D000906:Antibodies