After infection with novel coronavirus infection, clinical patients have varying degrees of severity, with mild, common, severe and critical cases. Patients with mild and common types account for 80% of cases, with milder disease, relatively few clinical symptoms, and a relatively small range of CT manifestations as pneumonia. Patients may be discharged after symptomatic fever reduction treatment and observation and isolation. Patients with the common type may have mild manifestations of pneumonia and can be discharged after a period of symptomatic treatment with appropriate antiviral and antibacterial infections in the absence of other secondary infections. Patients with severe cases and critical illnesses need active treatment and management, relying on their own immunity to clear the virus, and then with medical help and support, most patients can recover. Content source: Dr. You Lai