Inclusion Criteria:  Provide written, informed consent prior to all study-related procedures. Provide written, informed consent to undergo Human Immunodeficiency Virus (HIV) testing. Willingness and ability to attend scheduled visits and undergo study assessments. Able and willing to measure their oxygen saturation level and temperature, record their COVID-19 symptoms and complete a patient diary. Male or female aged 18 years or older. Confirmed and documented SARS-CoV-2 infection, defined as RT-PCR laboratory confirmation. Clinical and/or radiological findings indicative of moderate COVID-19 disease  Exclusion Criteria:  Severe or critical COVID-19 disease at enrollment (Day 1) (per NIH Treatment Guideline categorization) as determined by the Investigator. Inability to swallow oral medication. Concurrent known asthma, active tuberculosis or tuberculosis within the last 3 months, or any other condition that could compromise the well-being of the participant, or prevent, limit or confound protocol specified assessments, in the opinion of the Investigator. Female Participant who is pregnant, breast-feeding, or planning to conceive a child within the anticipated period of participating in the study or within 6 months after last dose of study medication. Males planning to conceive a child during the study or within 6 months of cessation of treatment.