Not contagious: Type i diabetes (dm) is not a contagious disease. There are genetic predispositions to acquiring dm, but even so, there are poorly understood environmental trigger(s) which need to be present to activate the immune system against insulin-making cells in such patients. As an example, if an identical twin develops dm, the other twin only has a 40% chance of also getting it.
Answered 3/26/2013
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