Was this article run through Google Translate? It's horribly written.
25 karma · joined January 17, 2014
Also, this statement is not correct. From OMIM on type 1:
"IDDM exhibits 30 to 50% concordance in monozygotic twins, suggesting that the disorder is dependent on environmental factors as well as genes. The average risk to sibs is 6% (Todd, 1990)."
There are other studies with similar conclusions. Having the "faulty" genes does not guarantee disease manifestation because the disease is multi-factorial.