Which virus causes the initial islet lesion in type 1 diabetes?
D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000209:etiology / Q000473:pathology*; D006801:Humans; D007515:Islets of Langerhans / Q000473:pathology*; D008297:Male; D009107:Mumps / Q000150:complications* / Q000473:pathology