The original levels of five cytokines were statistically significantly associated with COVID-19 mortality, i.e., IL-6 (p < 0.001), IL-2R (p < 0.001), IL-8 (p < 0.001), IL-10 (p < 0.001), and TNF-α (p < 0.05). Here, CXCL8 is linked to COVID-19.