(1) age =18 years old, gender not limited, (2) Laboratory (RT-PCR) confirmed COVID-19, (3) the time from the first positive nucleic acid test to randomization does not exceed more than 4 days, (4) informed consent has been signed.

(1) age =18 years old, gender not limited, (2) Laboratory (RT-PCR) confirmed COVID-19, (3) the time from the first positive nucleic acid test to randomization does not exceed more than 4 days, (4) informed consent has been signed.