1. Those who agree to take part in the test and sign the informed consent form voluntarily, 2. Adults aged >=18years old, male or female, 3. The inpatients with mild or common type of COVID-19 confirmed according to the diagnostic criteria COVID-19 diagnosis and treatment plan - Sixth trial edition issued by the National Health Commission. 4. Respiratory Specimens (including but not limited to sputum, nasopharyngeal swab and secretion of lower respiratory tracts) are positive for 2019-nCoV nucleic acid by real-time fluorescent RT-PCR, or respiratory specimens are genetically sequenced and highly homologous to known 2019-nCoV.

1. Those who agree to take part in the test and sign the informed consent form voluntarily, 2. Adults aged >=18years old, male or female, 3. The inpatients with mild or common type of COVID-19 confirmed according to the diagnostic criteria COVID-19 diagnosis and treatment plan - Sixth trial edition issued by the National Health Commission. 4. Respiratory Specimens (including but not limited to sputum, nasopharyngeal swab and secretion of lower respiratory tracts) are positive for 2019-nCoV nucleic acid by real-time fluorescent RT-PCR, or respiratory specimens are genetically sequenced and highly homologous to known 2019-nCoV.