Inflammatory cytokines, including IL-6 and TNF-α, were also elevated in this COVID-19 cohort and were higher in critical patients than in noncritical patients (IL-6, mean: 32.7, IQR: 9.5, 109.9 vs. 3.8, IQR: 1.6, 11.8, pg/mL, respectively, P = 0.045; TNF-α, mean: 10.2, IQR: 7.3, 16.2 vs. mean 8.2, IQR: 6.2, 11 pg/mL, respectively, P = 0.002). Here, TNF is linked to COVID-19.