Novel coronavirus can be detected by blood. Laboratory tests for novel coronaviruses are characterized by normal or decreased total white blood cell count and decreased lymphocyte count early in the course of the disease, with some patients presenting with increased liver enzymes, myokines and myoglobin. In most patients, C-reactive protein and sedimentation are elevated and calcitoninogen is normal. In severe cases, D-dimer is elevated. Combined with the epidemiological history and clinical manifestations can be confirmed as a suspected case, confirmation of diagnosis also requires pathogenic testing, real-time novel coronavirus nucleic acid testing of respiratory specimens or blood specimens from suspected cases.