IL19 and inflammatory skin disease: Additionally, IL-19 levels significantly differed between mild, moderate, and severe AV patients, with changes being proportional to the degree of clinical severity, as shown in Figure 2 and Table 1.Several other studies assessed the IL-19 concentration level, and the role of IL-19 in the pathogenesis of other skin inflammatory diseases was established by several previous studies for psoriasis and atopic dermatitis [24].