title: Clean living increases more than just atopic disease.
authors.forename: G A
authors.initials: GA
authors.lastname: Rook
mesh_terms: D000818:Animals; D002648:Child; D002675:Child, Preschool; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology* / Q000382:microbiology / Q000821:virology; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology