In the context of COVID-19 epidemic, other researchers found that the maximal level of plasma IL-6 was higher in critical cases than in severe cases (median 1072.98 pg/mL (IQR 453.85–9163.64) vs. 49.14 pg/mL (IQR 27.98–101.30); p = 0.001) [74]. The gene discussed is IL6; the disease is COVID-19.