We found a significant positive correlation between the following cytokines and the severity of the COVID-19, which including IL-1β (ρ=0.77, p=0.015) and HGF (ρ=0.83, p= 0.006), while GRO-α (ρ=-0.68, p=0.046), IL-9 (ρ=-0.78, p=0.0139), TNF-α (ρ=-0.71, p=0.0325) and TNF-β (ρ=-0.86, p=0.0029) were negative correlated with disease severity (Table 2). The gene discussed is IL9; the disease is COVID-19.