Patients with COVID-19 and low PCT had much lower mean IL-6 levels in the CSF [7.0 pg/ml, (range 0.7–24.7 pg/ml)] and serum [51.3 pg/ml (0.75–345.5 pg/ml)] than patients with COVID-19 and high PCT (IL-6 serum 174.9 pg/ml (7.1–552.4 pg/ml) and CSF with mean IL-6 levels at 96.9 pg/ml (range 1.5–552.1 pg/ml). The gene discussed is IL6; the disease is COVID-19.