title: Viral and epidemiological studies.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001327:Autoimmune Diseases / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000453:epidemiology* / Q000209:etiology / Q000276:immunology; D004739:England; D004770:Enterovirus / Q000276:immunology; D006801:Humans; D007223:Infant; D007515:Islets of Langerhans / Q000473:pathology; D012621:Seasons; D014777:Virus Diseases / Q000150:complications* / Q000276:immunology