Moreover, Li et al. [16] showed that IL-2, IL-4, IFN-γ, and TNF-α levels were not significantly different between deceased patients and survivors of COVID-19, and the absolute counts of CD3+ T cells, CD3+ CD4+ T cells, and CD3+CD8+ T cells in the deceased group were always at a low level. The gene discussed is CD8A; the disease is COVID-19.