As for the congealing fibrinogenolysis system, according to a different report, D-dimer, fibrin and fibrinogen degradation product, and prolonged prothrombin time were significant factors in nonsurviving COVID-19 cases, suggesting that the effects of the congealing fibrinogenolysis system are associated with the aggravation of pneumonia [22]. The gene discussed is F2; the disease is susceptibility to pneumonia measurement.