1. The patients who were diagnosed with the common type of NCP (including severe risk factors) and severe cases of new coronavirus pneumonia, 2. Aged 18 to 85 years, 3. IL-6 elevated (using Elisa method, using the same company kit), 4. Patients or authorized family members volunteered to participate in this study and signed informed consent. Definition of Novel Coronavirus Pneumonia (NCP) clinical cases: 1. Regular patients with NCP (including severe risk factors): patients with dual pulmonary lesions based on common NCP clinical symptoms accompanied by fever or no fever, 2. Critical NCP patient: Refer to the New Coronavirus Pneumonia Diagnosis and Treatment Plan (Fifth Edition) formulated by the National Health Commission.

1. The patients who were diagnosed with the common type of NCP (including severe risk factors) and severe cases of new coronavirus pneumonia, 2. Aged 18 to 85 years, 3. IL-6 elevated (using Elisa method, using the same company kit), 4. Patients or authorized family members volunteered to participate in this study and signed informed consent. Definition of Novel Coronavirus Pneumonia (NCP) clinical cases: 1. Regular patients with NCP (including severe risk factors): patients with dual pulmonary lesions based on common NCP clinical symptoms accompanied by fever or no fever, 2. Critical NCP patient: Refer to the New Coronavirus Pneumonia Diagnosis and Treatment Plan (Fifth Edition) formulated by the National Health Commission.