The expression levels of a 13-cytokine panel (IL-1α, IL-1β, IL-2, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12, NF-κβ, and IFN-α, IFN-β, and IFN-γ) were measured by qRT-PCR from peripheral blood mononuclear cells (PBMC) obtained from the patient with TEN and their parents (which were positive for COVID-19). The gene discussed is IL4; the disease is toxic epidermal necrolysis.