inclusion criteria: 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.

inclusion criteria: 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.

inclusion criteria: age ≥18 years old, gender not limited; laboratory (rt-pcr) confirmed covid-19; the time from the first positive nucleic acid test to randomization does not exceed more than 4 days; informed consent has been signed.

inclusion criteria: age ≥18 years old, gender not limited; laboratory (rt-pcr) confirmed covid-19; the time from the first positive nucleic acid test to randomization does not exceed more than 4 days; informed consent has been signed.

inclusion criteria: 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.

inclusion criteria: 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.