Hemoglobin (HGB, 139.64 vs 132.97 g/L, P < 0.001) and mean corpuscular-hemoglobin concentration (MCHC, 326.58 vs 321.20 g/L, P < 0.0 1) content were significantly increase after TCM treatment, which further proved the TCM supplementary treatment was beneficial to the recovery from COVID-19. Here, CYGB is linked to COVID-19.