(1) Aged 18 to 65 years old, (2) Patients with mild or normal type who have been diagnosed with new type of coronavirus infection [in accordance with the diagnostic criteria of the Notice on Printing and Distributing New Coronavirus Pneumonia Diagnosis and Treatment Plan (Trial Implementation) issued by the National Health and Medical Commission], (3) According to the National Health and Health Commission's antiviral treatment for more than 10 days, the COVID-19 nucleic acid examination of the throat swabs/putum /stool samples was still positive or weakly positive.

(1) Aged 18 to 65 years old, (2) Patients with mild or normal type who have been diagnosed with new type of coronavirus infection [in accordance with the diagnostic criteria of the Notice on Printing and Distributing New Coronavirus Pneumonia Diagnosis and Treatment Plan (Trial Implementation) issued by the National Health and Medical Commission], (3) According to the National Health and Health Commission's antiviral treatment for more than 10 days, the COVID-19 nucleic acid examination of the throat swabs/putum /stool samples was still positive or weakly positive.