title: Fall in human herpesvirus 6 seropositivity with age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging / Q000276:immunology*; D000914:Antibodies, Viral / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D006564:Herpesviridae / Q000145:classification / Q000276:immunology*; D006801:Humans; D007223:Infant
chemical_list: D000914:Antibodies, Viral