The research finding which signified the difference in IL-19 serum concentration on various degrees of severity of acne vulgaris is in line with a study conducted by Li et al., measuring IL-19 in patients with psoriasis, which emphasizes that, with reference to etiopathogenesis, the severity of both diseases is indicated by an increase in concentration of proinflammatory cytokines [19]. The gene discussed is IL19; the disease is acne.