1. Patients who are hospitalized for in-patient treatment or currently being evaluated for potential hospitalization at the time of informed consent for conditions other than COVID-19

2. History of chronic lung disease

3. Ongoing requirement for oxygen therapy

4. Shortness of breath in resting position

5. Diagnosis of sleep apnea requiring Bilevel Positive Airway Pressure (BIPAP) / Continuous Positive Airway Pressure (CPAP)

6. Female patients who are pregnant, trying to become pregnant or lactating.

7. Is considered, in the opinion of the PI, to be unlikely for any reason to be able to comply with study procedures

A Clinical Study to Assess the Physiologic Effects of KB109 in Patients With COVID-19 on Gut Microbiota Structure and Function

What this study is about