inclusion criteria: 1. ≥18 and ≤80 years old, male or female. 2. asymptomatic infection,mild or common type of covid-19. 3. initial positive test of sars-cov-2 within 5 days of randomization. 4. initial onset of covid-19 signs/symptoms within 3 days of randomization.

inclusion criteria: 1. ≥18 and ≤80 years old, male or female. 2. asymptomatic infection,mild or common type of covid-19. 3. initial positive test of sars-cov-2 within 5 days of randomization. 4. initial onset of covid-19 signs/symptoms within 3 days of randomization.

inclusion criteria: ≥18 and ≤80 years old, male or female. asymptomatic infection,mild or common type of covid-19. initial positive test of sars-cov-2 within 5 days of randomization. initial onset of covid-19 signs/symptoms within 3 days of randomization.

inclusion criteria: ≥18 and ≤80 years old, male or female. asymptomatic infection,mild or common type of covid-19. initial positive test of sars-cov-2 within 5 days of randomization. initial onset of covid-19 signs/symptoms within 3 days of randomization.