1. Male and female aged 18-75 years old, 2. Patients previously diagnosed with COVID-2019: the course of illness is no more than 14 days,If the course of disease was more than 14 days, patients meeting one of the following conditions could also be included: (1) no obvious absorption or progression of chest lesions within 7 days, (2) respiratory symptoms (chest tightness, or cough, or breathing difficulties), Nucleic acid positive within 3 days 3. sign the informed consent, 4. Agree to collect clinical samples, 5. Female or male subjects of childbearing age agree to take effective contraceptive measures within 3 months of the last oral medication to ensure that female or male partners of childbearing age are not pregnant.

1. Male and female aged 18-75 years old, 2. Patients previously diagnosed with COVID-2019: the course of illness is no more than 14 days,If the course of disease was more than 14 days, patients meeting one of the following conditions could also be included: (1) no obvious absorption or progression of chest lesions within 7 days, (2) respiratory symptoms (chest tightness, or cough, or breathing difficulties), Nucleic acid positive within 3 days 3. sign the informed consent, 4. Agree to collect clinical samples, 5. Female or male subjects of childbearing age agree to take effective contraceptive measures within 3 months of the last oral medication to ensure that female or male partners of childbearing age are not pregnant.