title: Seroepidemiological studies of echovirus type 30 infection.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000914:Antibodies, Viral / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D004457:Echovirus Infections / Q000453:epidemiology* / Q000276:immunology / Q000382:microbiology; D029822:Enterovirus B, Human / Q000276:immunology*; D006801:Humans; D007223:Infant; D007564:Japan; D008875:Middle Aged; D009500:Neutralization Tests; D012044:Regression Analysis; D012189:Retrospective Studies
chemical_list: D000914:Antibodies, Viral