I was diagnosed t1 @25, my mum was a t1 @24. Every new health professional I see I ask is it connected, they all say it isn't. No one else in family has/had it. Just in conversations with a research team who are going to screen my children's blood (& my brother's) to see if they may be at risk of developing it in the future (saw it on a poster with the Jonah brothers on it at local hospital). there are trials for immunisation treatments if they are at risk, not sure I'd take that up but would consider. if anyone interested, do inbox me (can't remember name of it)