TNF and COVID-19: In agreement with other studies, we found that inflammatory cytokines are elevated in hospitalized COVID-19 patients compared with HC [median (IQR), all units picograms per milliliter: IL-6 4.65 (3.32–9.16) vs 0.69 (0.55–0.89), p < 0.001; TNFα 4.49 (1.87–8.03) vs 0.04 (0.04–0.84), p < 0.001].