Dan Hurley in Diabetes Rising examines the observed rise in prevalence rates. He notes that part of it could be due to better diagnoses (i.e. we now diagnose LADA), this is one reason that people argue that there is no Autism explosion, it is simply more people getting diagnosed. But then Hurley then goes through explores a variety of other potential connections which might be part of the rise in T1 rates. It is all basically epidemiological, and most of them have to do with environmental stuff like diet and toxins. But it is plausible and worth of being explored.
