IL17A and COVID-19: The mean levels of serum IL-17 and IL-6 were increased significantly in COVID-19 patients who experienced severe illness (279.5 ± 210.245 ng/ml and 486.02 ± 1048.1 pg/ml) compared to those who experienced moderate symptoms (188.234 ± 61.206 ng/ml and 58.627 ± 83.085 pg/ml), p = 0.004 and p = 0.006, respectively, (Fig. 5a-c).