In contrast, despite a more broadly spread sensitization pattern and higher frequency of IgE-reactivity having been previously described [26,27], we found that the same number of HDM molecular allergens—i.e., Der p 1, Der p 2, Der p5, Der p 7, Der p 21, and Der p 23—was recognized across both AD groups, regardless of their severity stage. Here, IGHE is linked to Alzheimer disease.