TNF and infection: There are other laboratory tests for the status of 2019-nCoV infection, including blood gas analysis, liver and kidney function, myocardial enzyme, myoglobin, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), Procalcitonin (PCT), lactate, D-dimer, coagulation image, urine routine test, inflammatory factors (interleukin(IL)-6, IL-10, TNF - α), 11 items of tuberculosis (TB) subgroup, complement, anti-acid staining, etc. Blood gas analysis is helpful to judge the oxygenation of moderately-illed and severe patients.