According to COVID-19 severity at Tpost, in both severe and non-severe groups a significant reduction in plasma levels of NfL and sCD163 was observed compared to baseline (NfL: p = 0.0008 and p = 0.0003, respectively; sCD163: p = 0.0240 and p = 0.0014, respectively) (Table 5). The gene discussed is NEFL; the disease is COVID-19.