“ In this paper, we discuss candidate triggers of islet autoimmunity and factors thought to promote progression from autoimmunity to overt type 1 diabetes (figure 1). These factors seem to have their effect mainly in the genetically predisposed individuals.” [my emphasis]
“ Importantly, environmental factors that trigger islet autoimmunity might differ from those that promote progression from autoimmunity to overt diabetes.”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5571740/