lack of sufficient numbers of critically ill patients to enroll the study

Up to 240 patients with confirmed COVID-19 pneumonia with a baseline imputed PaO2/FiO2 ≤200 receiving oxygen therapy via a high flow nasal cannula (HFNC) or non-invasive ventilation (NIV) will be enrolled at up to 40 sites. All patients will receive three doses of Auxora. Patients who continue to have severe hypoxemic respiratory failure at 48 hours will be randomized to receive three additional doses of Auxora or three doses of placebo. All patients will be followed for 60 days after enrollment into the study.

Up to 240 patients with confirmed COVID-19 pneumonia with a baseline imputed PaO2/FiO2 ≤200 receiving oxygen therapy via a high flow nasal cannula (HFNC) or non-invasive ventilation (NIV) will be enrolled at up to 40 sites. All patients will receive three doses of Auxora.

Patients with severe hypoxemic respiratory failure, those on HFNC with a recorded worst imputed PaO2/FiO2 ≤100 between the end of the infusion of Auxora at 24 hours and the start of the infusion of Auxora at 48 hours or are on NIV or IMV at the start of the infusion of Auxora at 48 hours, will be randomized 1:1 to receive 1.6 mg/kg (1 mL/kg) of Auxora or 1 mL/kg of Placebo at 72, 96 and 120 hours from the SFIA. Patients on IMV will be stratified between the Auxora and Placebo groups. Patients without severe hypoxemic respiratory failure, those with a recorded worst imputed PaO2/FiO2 >100 between the end of the infusion of Auxora at 24 hours and the start of the infusion of Auxora at 48 hours and are not on NIV or IMV, will not be randomized for further infusions but will remain in the study and complete all assessments through Day 60.

Patients enrolled in the study should receive dexamethasone, or equivalent dose of another corticosteroid, as standard of care. The use of remdesivir should be considered and the use of tocilizumab is encouraged.

Inclusion Criteria:

1. Has laboratory-confirmed SARS-CoV-2 infection as determined by polymerase chain reaction (PCR) or other commercial or public health assay in any specimen, as documented by either of the following:

   • PCR positive in sample collected < 72 hours prior to consent;
   • PCR positive in sample collected ≥ 72 hours prior to consent, with inability to obtain a repeat sample (e.g. due to lack of testing supplies, or limited testing capacity, or results taking >24 hours, etc.) or progressive disease suggestive of ongoing SARS-CoV-2 infection;

2. At least 1 of the following symptoms:

   o Fever, cough, sore throat, malaise, headache, muscle pain, dyspnea at rest or with exertion, confusion, or respiratory distress;

3. A PaO2/FiO2 ≤200 recorded in the 24 hours before consent. The PaO2/FiO2 can be imputed from pulse oximetry;

4. Oxygen therapy being administered via HFNC or NIV

5. The presence of a respiratory infiltrate or abnormality consistent with pneumonia that is documented by either a CXR or CT scan of the lungs;

6. The patient is ≥18 years of age;

7. A female patient of childbearing potential must not attempt to become pregnant for 180 days, and if sexually active with a male partner, is willing to practice acceptable methods of birth control for 180 days after the last dose of study drug;

8. A male patient who is sexually active with a female partner of childbearing potential is willing to practice acceptable methods of birth control for 180 days after the last dose of study drug. A male patient must not donate sperm for 180 days;

9. The patient is willing and able to, or has a legal authorized representative (LAR) who is willing and able to, provide informed consent to participate, and to cooperate with all aspects of the protocol.

Exclusion Criteria:

1. Do Not Intubate order;

2. PaO2/FiO2 ≤75 recorded at the time of consent. The PaO2/FiO2 can be imputed from pulse oximetry;

3. Receiving IMV via endotracheal intubation or tracheostomy;

4. Receiving ECMO;

5. Shock defined by the use of vasopressors;

6. Known history of:

   • Organ or hematologic transplant;
   • HIV;
   • Active hepatitis B, or hepatitis C infection;

7. Current treatment with:

   • Chemotherapy;
   • Immunosuppressive medications or immunotherapy (see protocol (Section 5.3) for list of prohibited immunosuppressive medications and immunotherapy) at the time of consent;
   • Hemodialysis or Peritoneal Dialysis;

8. Known to be pregnant or is nursing;

9. Currently participating in another study of an investigational drug or therapeutic medical device at the time of consent;

10. Known allergy to eggs or any of the excipients in study drug.