Background/Objectives: Next-generation drugs, such as JAK inhibitors and biologics, have proved to be very effective treatment choices in several autoimmune and autoinflammatory skin disorders. However, these drugs are not without risk. Due to their immunemodulating properties, these drugs may pose a risk of infection, which could vary between drug target, disorder type and pathogen. Our goal was to determine infection risk and how it may vary by drug target, pathogen and skin disorder, namely psoriasis, atopic dermatitis, alopecia areata, vitiligo and hidradenitis suppurativa. Methods: We performed a systematic search and meta-analysis where we extracted the rates of different infections from the adverse events of each trial that were found and met our inclusion criteria. Results: We found significant associations in psoriasis and atopic dermatitis where infection risk varied by drug, skin condition and pathogen type. We specifically found that there was an increased risk of viral infection for patients with atopic dermatitis with both JAK inhibitors and biologics. We also found an increased risk of fungal infections in psoriasis patients receiving targeted therapies. Lastly, we observed a decreased risk of bacterial infections in atopic dermatitis with dupilumab specifically. Additionally, there was a significantly higher incidence of herpes simplex infections in atopic dermatitis patients with target-selective JAK inhibitors, while no increased risk was observed with herpes zoster. Conclusions: There is a varied risk with these next-generation medications that needs to be considered when determining treatment regime.
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