(1) Patients aged from 18 to 75 years old, (2) Mild patients with confirmed COVID-19 according to the diagnostic criteria of novel coronavirus Infection Diagnosis and Treatment Plan (Trial 6th Edition) issued by the National Health and Safety Commission, (3) Patients and their families voluntarily participated in the study and signed an informed consent form.

(1) Patients aged from 18 to 75 years old, (2) Mild patients with confirmed COVID-19 according to the diagnostic criteria of novel coronavirus Infection Diagnosis and Treatment Plan (Trial 6th Edition) issued by the National Health and Safety Commission, (3) Patients and their families voluntarily participated in the study and signed an informed consent form.