Inclusion Criteria:  Exposure to COVID-19 in the last 60 days with no symptoms, with a COVID negative test Close contact: within 6 feet of a COVID-19 positive person for more than a few minutes without wearing PPE, or having direct contact with infectious secretions without PPE Positive COVID-19 test with or without symptoms  Exclusion Criteria:  COVID-19 positive hospitalized patient Patients who have symptoms of COVID but have not been tested. Unable to tolerate oral intake In hospice or palliative care Unstable medical or psychiatric condition Other criteria deemed acceptable by principle investigator