IL26 and COVID-19: Similarly, the limited size of our current study material, and the fact that it only included 5 patients with mild COVID-19 (hospitalized without supplemental oxygen), can explain why we failed to detect a statistically significant difference in the plasma concentrations of IL-26 between COVID-19 patients with mild or severe disease (p-value > 0.99, not shown), or a direct correlation between the plasma concentration of IL-26 and an assessment of disease severity (i.e., number of hospitalization days per patient).