[TrackerFF]

My in-law (brother) got what is called diabetes type "1.5", or LADA (latent autoimmune diabetes in adults), at the ripe age of 40.

It is like type 1, but much, much slower progressing - hence why it shows up at adult age, compared to childhood. Unlike type 2, you can't keep it under control by lifestyle changes. My in-law is a physically fit person with a good diet, and has been his whole life.

In any case, after the onset of symptoms, he had to get treatment. No treatment leads to further organ damage, which eventually leads to death.

[dghughes]

Possibly caused by a virus. A person can develop type 1 diabetes from the effects of a virus like measles and other viruses. I don't think many people are aware of that.

[9baka]

Autoimmune conditions can stem from viral infections, yes. But most of the time type-1 diabetics have a very weak phenotype of the disease, that is to say, the patient has pancreatic antibodies (specifically beta-cell antibodies) and produces them very, very slowly. According to this source, half of all "new cases" (whatever that means) occurs in adults: https://diabetesjournals.org/care/article/44/11/2449/138477/...