Safety and Efficacy of EDP1815 in the Treatment of Patients Hospitalized With COVID-19 Infection

Key Inclusion Criteria:

1. Hospitalized within the last 36 hours.

2. Receiving any form of supplementary oxygen therapy at baseline.

3. Confirmed COVID-19 viral infection by RTPCR at screening.

4. Age:

1. 18-65 years old, OR

2. >65 year-olds can be included after Data Monitoring Committee (DMC) approval

Key Exclusion Criteria:

1. Contraindications/hypersensitivity to P histicola or any of the capsule excipients

2. Patients with chronic hypoxia or underlying significant chronic respiratory disease
(such as Chronic Obstructive Pulmonary Disease (COPD), Pulmonary Fibrosis, or
Bronchiectasis).

3. Admission to ICU at time of screening.

4. Mechanically ventilated, on continuous positive airway pressure (CPAP), or on
non-invasive ventilation at the time of screening.

5. Patient is taking a systemic immunosuppressive agent such as, but not limited to, oral
steroids, methotrexate, azathioprine, ciclosporin, or tacrolimus, unless these are
given as part of COVID standard of care treatment.

6. Patient has a diagnosed primary immunodeficiency.

7. Patient has a diagnosis of HIV/AIDS

8. Patient has pre-existing known chronic kidney disease stage 4 or 5 or requiring renal
replacement therapy (i.e. estimated glomerular filtration rate (eGFR)
<30ml/min/1.73m2)

9. Patient has pre-existing known significant liver disease with Alanine aminotransferase
(ALT) or aspartate aminotransferase (AST) ≥ 5.0 x upper limit of normal (ULN)

10. Patient has pre-existing known significant gastrointestinal tract disease expected to
affect absorption within the small intestine (e.g. short bowel syndrome, inflammatory
bowel disease affecting the small intestine, gastroparesis); or prior malabsorptive
bariatric surgery that could interfere with GI delivery and transit time.

11. GI signs or symptoms equivalent to CTCAE v5.0, gastrointestinal disorders, grade 3 or
4 event.

12. Patient has pre-existing known substantially impaired cardiac function or pre-existing
clinically significant cardiac diseases, including unstable angina or acute myocardial
infarction ≤ 6 weeks prior to Screening.

13. Currently participating in an interventional clinical trial (observational studies
allowed).

14. Moribund at time of screening