This is an open-label, interventional exploratory study to evaluate the safety and efficacy of 5-ALA-Phosphate + SFC in subjects with acute moderate or severe respiratory illness secondary to infection with SARS-CoV-2 virus (COVID-19) involving 40 subjects.

The primary objective is to evaluate the safety of 4-week oral administration of 5-ALAPhosphate + SFC. This study is expected to last for 4 weeks and will include follow-up until day 28 in the hospital or in an outpatient setting if the subjects are discharged earlier.

This is an open-label, interventional exploratory study to evaluate the safety and efficacy of 5-ALA-Phosphate + SFC in subjects with acute moderate or severe respiratory illness secondary to infection with SARS-CoV-2 virus (COVID-19).

Heme is critical for appropriate oxygen binding and delivery to remote site and without the heme contained within the hemoglobin tetramer, multicellular organisms would be unable to survive. Furthermore HO-1 degrades heme into biliverdin, carbon monoxide (CO), and iron, and biliverdin is immediately reduced and turned into bilirubin by biliverdin reductase. Biliverdin/bilirubin and CO both have anti-oxidative functions and they regulate important biological processes like inflammation, apoptosis, cell proliferation, fibrosis, and angiogenesis. Therefore, HO-1 is deemed to be a promising drug target (Ryter 2006). HO-1 is a major anti-inflammatory enzyme and a key regulator that induces immune tolerance. 5-ALA-Phosphate + SFC increases heme metabolism and HO-1 via enhancement of porphyrin biology and utilizes the HO-1 for endothelial pacification strategy.

The primary endpoints of this study is- all treatment emergent AEs and SAEs Grade III and IV (CTC) with reasonable possibility of causal relationship to 5-ALA-Phosphate + SFC. 40 subjects with symptoms requiring hospitalization will be enrolled in thestudy, with 20 subjects enrolled in each group below:

Group 1: 20 Moderately ill hospitalized subjects not requiring assisted ventilation Group 2: 20 Severely ill hospitalized subjects requiring assisted ventilation

The duration of this clinical study will be 4 weeks, and follow-up will be performed until Day 28 in hospital, or in an outpatient setting if subjects improve and are discharged home or to alternative care facility.

Inclusion Criteria:

1. Willing and able to provide written informed consent, or with a legal representative who can provide informed consent

2. Aged ≥ 21 to 70 years

3. Acute Respiratory Syndrome Coronavirus (SARS-CoV)-2 infection confirmed by polymerase chain reaction (PCR) test before beginning study dose regime

4. qSOFA ≥ 1

5. Currently hospitalized

6. Moderate COVID-19 patients should meet any of the following criteria:

   evidence of lower respiratory disease by clinical assessment (qSOFA ≥ 1or imaging) and saturation of oxygen (SpO2) ≥94% on room air at sea level.

   Severe COVID-19 patients should meet any of the following criteria: a respiratory frequency >30 breaths per minute, SpO2 <94% on room air at sea level, ratio of arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) <300 mmHg, and lung infiltrates >50% (if possible to measure). In exceptional cases the investigator can decide due to certain signs and symptoms to assign a moderate patient to the severe group although not all criteria mentioned before are fulfilled (to be documented with explanation).

7. Radiographic evidence (chest X-ray or chest CT scan) of pulmonary infiltrates

8. Able to swallow 5 capsules of study product at dosing time points.

Exclusion Criteria:

1. Subject has critical symptoms of COVID19 infection as defined as: high-flow oxygen therapy (>15 l/min delivered by nasal cannula or mask) or invasive mechanical ventilation signifying respiratory failure, septic shock, and/or multiple organ dysfunction ventilation at screening.
2. Subject is nourished via a nasogastric tube
3. Subject has acute or chronic type(s) of porphyria or a family history of porphyria
4. Subject has demonstrated previous intolerance of 5-ALA and/or SFC by topical or oral administration (except for photosensitivity)
5. Pregnant or nursing women
6. Males and females of reproductive potential who have not agreed to use an
7. adequate method of contraception during the study For females, adequate birth control methods will be defined as: hormonal contraceptives, intrauterine device or double barrier contraception, i.e., condom + diaphragm, condom or diaphragm + spermicidal gel or foam For males, adequate birth control methods will be defined as double barrier contraception, i.e., condom + diaphragm, condom or diaphragm + spermicidal gel or foam For females, menopause is defined as one year without menses; if in question, a folliclestimulating hormone of >40 U/ml must be documented. Hysterectomy, bilateral oophorectomy,or bilateral tubal ligation must be documented, as applicable
8. Subjects who are unable or unwilling to comply with requirements of the clinical trial
9. Participation in any other clinical trial of an experimental treatment for COVID-19
10. Evidence of multiorgan failure
11. Alanine Aminotransferase (ALT) or aspartate aminotransferase (AST) > 5 X upper limit of normal (ULN)
12. Creatinine clearance < 50 mL/min using the Cockcroft-Gault formula for participants ≥ 18 years of age {Cockcroft 1976}
13. Any other reason that makes the subject unsuitable in the Investigator's opinion

Monitoring, audits, and REC review will be permitted and provide direct access to source data and documents. The Lead PI and the researchers assigned by him will have access to the stored data/specimens. Only the Lead PI and the researchers assigned working on this study will be eligible to obtain the data/specimens from the participants during data collection.

Data will be collected in the case report form to allow for cross referencing to check validity.

Study documents (paper) will be retained in a secure (kept locked when not in use) location during and after the trial has finished. All essential documents including source documents will be retained for a period of 5 years after study completion (last patient, last study point).

Study documents (paper) will be retained in a secure (kept locked when not in use) location during and after the trial has finished.