Study of the Safety of Therapeutic Treatment With an Immunomodulatory Agent (N-803) in Adults With COVID-19

Inclusion Criteria

1. Age ≥ 18 years old.

2. Able to understand and provide a signed informed consent that fulfills the relevant
Institutional Review Board (IRB) or Independent Ethics Committee (IEC) guidelines.

3. Has laboratory-confirmed positive novel coronavirus (SARS-CoV-2) test, as determined
by polymerase chain reaction (PCR), or other commercial or public health assay in any
specimen < 72 hours prior to enrollment, or meets the criteria to guide the evaluation
and testing of patients under investigation (PUI) for COVID-19
(https://emergency.cdc.gov/han/2020/HAN00428.asp).

4. Has a confirmed NEW score of 0-5.

5. Has at least one of the following high-risk factors associated with a higher risk of
COVID-19 progression:

1. Age ≥ 60 years.

2. Hypertension currently managed by at least 1 antihypertensive medication.

3. Type 1 or 2 diabetes.

4. Chronic obstructive pulmonary disease (COPD) diagnosed per medical history.

6. Adequate respiratory and heart function, evidenced by the following laboratory
results:

1. Respiratory rate (RR) < 20 breaths per minute (bpm).

2. Heart rate (HR) < 90 beats per minute (bpm).

3. Arterial oxygen saturation (SaO2) > 93% on room air.

7. Agrees to the collection of nasopharyngeal (NP) swabs and venous blood per protocol.

8. Ability to participate in required study visits and participate in adequate follow-up,
as required by this protocol.

9. Agreement to practice effective contraception for female subjects of child-bearing
potential and non-sterile males. Female subjects of child-bearing potential must agree
to use effective contraception while on study and for at least 1 month after the last
dose of N-803. Non-sterile male subjects must agree to use a condom while on study and
for up to 1 month after the last dose of N-803. Effective contraception includes
surgical sterilization (eg, vasectomy, tubal ligation), two forms of barrier methods
(eg, condom, diaphragm) used with spermicide, intrauterine devices (IUDs), oral
contraceptives, and abstinence.

Exclusion Criteria:

1. Shortness of breath or hypoxia defined by a ratio of partial pressure of arterial
oxygen to the percentage of inspired oxygen (PaO2/FiO2) ≤ 300 mmHg or signs of serious
lower airway disease.

2. Signs or symptoms of acute respiratory distress syndrome (ARDS), systemic inflammatory
response syndrome (SIRS)/shock, or cardiac failure; or need for supplemental oxygen.

3. Inflammatory markers (C-reactive protein [CRP], lactate dehydrogenase [LDH], d-dimer,
ferritin, and IL-6) > 1.5 × upper limit of normal (ULN).

4. Assessed by the Investigator to be unable or unwilling to comply with the requirements
of the protocol.

5. Pregnant and nursing women. A negative serum or urine pregnancy test during screening
prior to the first dose must be documented before N-803 is administered to a female
subject of child-bearing potential.