1. Aged >=60 years, 2. Patients confirmed with novel coronavirus pneumonia. The Diagnostic criteria refer to Pneumonitis Diagnosis and Treatment Scheme for Novel Coronavirus Infection (Trial Version 5) , 3. Those without broad-spectrum antibacterial, antifungal, and antiviral treatment, 4. Imaging revealed pneumonia in patients with a diagnosis of pathogen: influenza, CAP/HAP bacterial infection, and fungal infection, 5. Participants signed informed consent before the study, 6. It must be agreed not to participate in other clinical studies until the 28th day of completion.

1. Aged >=60 years, 2. Patients confirmed with novel coronavirus pneumonia. The Diagnostic criteria refer to Pneumonitis Diagnosis and Treatment Scheme for Novel Coronavirus Infection (Trial Version 5) , 3. Those without broad-spectrum antibacterial, antifungal, and antiviral treatment, 4. Imaging revealed pneumonia in patients with a diagnosis of pathogen: influenza, CAP/HAP bacterial infection, and fungal infection, 5. Participants signed informed consent before the study, 6. It must be agreed not to participate in other clinical studies until the 28th day of completion.