The original post said that “diabetes [is] related to poverty and class…”
The offered article says:
It holds that because infections are now relatively well controlled in the west, compared with a century or more ago, the immune system in some people starts attacking some part of the body, in the case of type 1 diabetes the pancreatic cells which produce insulin.
Dr Willis said that, based on the hypothesis, the higher incidence in more-affluent areas might be because of differences in factors like family size or patterns of child-care use - things that exposed a child more, or less, to other people and their infections.
The point being that there are many causes, some theorized, of diabetes (type 1, type 1 1/2 , type 2, type 3). To say that “diabetes is related to poverty and class” is unbelievable/profound ignorance.