The rate of virus inhibition [Time Frame: Day 0; 4; 7; 14 and 21]Novel coronaviral nucleic acid is measured in nose / throat swab at each time point.Time (days) from randomization to recovery defined asAbsence of symptoms of greater than mild severity for 24 hours Not requiring supplemental oxygen beyond pre-COVID baseline

The rate of virus inhibition [Time Frame: Day 0; 4; 7; 14 and 21]Novel coronaviral nucleic acid is measured in nose / throat swab at each time point.Time (days) from randomization to recovery defined asAbsence of symptoms of greater than mild severity for 24 hours Not requiring supplemental oxygen beyond pre-COVID baseline