1. Aged>= 18, male or female, 2. Fever, axillary temperature > 37.3 degrees, 3. Consistent with the clinical diagnosis of COVID-19 mild, normal, severe case, 4. Patients who sign informed consent form freely and voluntarily.

1. Aged>= 18, male or female, 2. Fever, axillary temperature > 37.3 degrees, 3. Consistent with the clinical diagnosis of COVID-19 mild, normal, severe case, 4. Patients who sign informed consent form freely and voluntarily.