Baseline serum omentin concentrations did not differ between COVID-19 patients and controls (363.6 [245.2-513.0] vs. 368.9 [254.1-468.8] ng/mL; <i>p</i> = 0.994), and remained stable between Day 0 and Day 7 (<i>p</i> = 0.605). The gene discussed is ITLN1; the disease is COVID-19.