COVID-19, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection
Conditions
Keywords
Coronavirus disease, Severe acute respiratory syndrome coronavirus 2, SARS-CoV-2, COVID-19, Asymptomatic
Brief summary
The purpose of the study is to compare the efficacy of anti-COVID-19 immune globulin (human) 20% (C19-IG 20%) (2 doses) versus placebo with regard to the percentage of asymptomatic participants who remain asymptomatic, i.e., who do not develop symptomatic coronavirus disease 2019 (COVID-19) through Day 14 as per the protocol defined criteria.
Interventions
BIOLOGICALC19-IG 20%
Anti-COVID-19 Immune Globulin (Human) 20%
DRUG0.9% Sodium chloride
C19-IG 20% matching placebo
Sponsors
Grifols Therapeutics LLC
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
1. Ambulatory male or female outpatients ≥ 18 years of age who have laboratory-confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection as determined by qualitative PCR (reverse transcriptase (RT)-PCR), or other commercial or public health assay approved by regulatory authorities as a diagnostic test for COVID-19 (inclusive of SARS-CoV-2 antigen testing or other approved rapid testing platforms) in any specimen ≤ 5 days prior to randomized treatment. 2. Asymptomatic with no constitutional COVID-19 illness (evident symptoms), specifically no fever, cough, shortness of breath, fatigue, anorexia, vomiting/diarrhea, headache that is unrelated to pre-existing conditions (example, migraine), sore throat that is unrelated to other pre-existing medical conditions (example, allergies, gastroesophageal reflux disease), myalgias, olfactory disorders unrelated with previous medical condition, or evidence of pneumonia at Screening. 3. Pulse oximetry peripheral oxygen saturation (SpO2) (oxygen saturation) on room air \> 94% (i.e., 95% to 100%) at Screening. 4. National Early Warning Score (NEWS) ≤ 2 points at Screening. 5. Participant provides informed consent (ICF) prior to initiation of any study procedures.
Exclusion criteria
1. Participants who are admitted to hospital or for whom hospital admission is being planned at the time of Screening. 2. Participants requiring any form of oxygen supplementation at Screening. 3. Concurrent or planned treatment with other agents with actual or possible direct antiviral activity against SARS-CoV-2 including remdesivir. 4. Prior, concurrent or planned treatment with monoclonal antibodies (mAbs) against SARS-CoV-2 5. Have participated in a previous SARS-CoV-2 vaccine study OR outside of a study have received any SARS-CoV-2 vaccine of any kind. 6. Have a history of convalescent COVID-19 plasma treatment at Screening. 7. Fever (temperature ≥38.0° C \[≥100.4° F\]), measured orally, requirement for antipyretics to reduce temperature (administered for fever), and/or respiratory symptoms (cough, dyspnea) at Screening. 8. Clinical evidence of any significant acute or chronic disease that, in the opinion of the investigator, may place the participant at undue medical risk for study treatment. 9. The participant has had a known (documented) history of serious anaphylactic reaction to blood, any blood-derived plasma product or commercial immunoglobulin, or has known selective immunoglobulin A (IgA) deficiency with anti-IgA antibodies. 10. Decompensated congestive heart failure or renal failure with fluid overload. This includes currently uncontrolled congestive heart failure New York Heart Association Class III or IV stage heart failure. 11. Participants for whom there is limitation of therapeutic effort such as Do not resuscitate status. 12. Currently participating in another interventional clinical trial with investigational medical product or device. 13. Participants with known (documented) thrombotic complications to polyclonal intravenous immune globulin (IVIG) therapy in the past. 14. Participant has medical condition (other than COVID-19) that is projected to limit lifespan to ≤ 1 year. 15. Participant has history of drug or alcohol abuse within the past 12 months. 16. Participant is unwilling to commit to follow-up visits. 17. Women who are pregnant or breastfeeding, or if of childbearing potential, unwilling to practice a highly effective method of contraception (oral, injectable, or implanted hormonal methods of contraception, placement of an intrauterine device or intrauterine system, condom, or occlusive cap with spermicidal foam/gel/cream/suppository, male sterilization, or true abstinence) throughout the study. * True abstinence: When this is in line with the preferred and usual lifestyle of the participant. (Periodic abstinence \[e.g., calendar, ovulation, symptothermal, post-ovulation methods\], declaration of abstinence for the duration of a trial, and withdrawal are not acceptable methods of contraception). * Note: Women who are \>55 years and with the absence of menses in the last 12 months are considered to be not of childbearing potential. Female participants of childbearing potential must have a negative test for pregnancy blood or urine human chorionic gonadotropin (hCG)-based assay at Screening/Baseline Visit.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Percentage of Asymptomatic Participants Who Remained Asymptomatic, i.e., Who Did Not Develop Symptomatic COVID-19 Through Day 14 | Up to Day 14 | Participants were described as symptomatic if they a. experienced at least two of the following systemic symptoms: fever (≥38 ºC), chills, myalgia, headache, sore throat, cough, fatigue that interferes with activities of daily living, new olfactory/taste disorder(s), and vomiting/diarrhea, b. experienced at least one of the following respiratory signs/symptoms: new or worsening shortness of breath or difficulty breathing; c. experienced a peripheral oxygen saturation by pulse oximetry (SpO2) \<94% on room air; or d. had radiographical evidence of pneumonia. The percentage of participants who meet the primary endpoint within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% confidence interval (CI). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 3, Day 7, and Day 14 | An outpatient setting was defined as no hospitalization or intensive care unit (ICU) admission through Days 3, 7, and 14. The percentage of participants who remained in an outpatient setting and maintained SpO2 ≥94% on room air at each timepoint within each treatment group were presented along with a two-sided exact (Clopper-Pearson) 95% CI. p-value and 95% CI were not estimable for C19-IG 20% 1 g vs placebo as all participants had remained in an outpatient setting and maintained SpO2 ≥94% on Room Air in C19-IG 20% 1 g and placebo arm on Day 3. |
| Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 3, Day 7, Day 14, and Day 29 | The percentage of participants with negative SARS-CoV-2 by PCR through Day 14 and Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
| Time to Negative SARS-CoV-2 PCR From Baseline Through Day 29 | Baseline to Day 29 | The first negative test result was defined as the first PCR negative result after the first PCR positive result. Kaplan-Meier method was used for analysis. Participants who did not have any viral load data or had negative test results through the study were excluded from the KM analysis. |
| Percentage of Participants Who Required Oxygen (O2) Supplementation on or Before Day 29 | Up to Day 29 | The percentage of participants requiring oxygen supplementation through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
| Duration of Any Oxygen Use Through Day 29 | Up to Day 29 | The duration (number of days) of any oxygen use from Day 1 through Day 29 was calculated based on the start/stop date of using oxygen supplementation. |
| Absolute Value Score on a 7-point Ordinal Scale | Baseline, Day 7, 14, and 29 | The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or extracorporeal membrane oxygenation (ECMO); 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities. A higher score indicates less severity. |
| Mean Change From Baseline in the 7-point Ordinal Scale | Baseline to Day 7, Day 14, and Day 29 | The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or ECMO; 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities. A higher score indicates less severity. The analysis was performed by using a linear mixed-effects model for repeated measures (MMRM). |
| Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Days 1, 7, 14, and 29 | The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or ECMO; 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities. |
| Change From Baseline in National Early Warning Score (NEWS) | Baseline to Day 7, Day 14, and Day 29 | The NEWS has demonstrated an ability to classify participants at risk of poor outcomes. This score is based on 7 clinical parameters (respiration rate, oxygen saturation, any supplemental oxygen, temperature, systolic blood pressure (BP), heart rate, level of consciousness \[Alert, Voice, Pain, Unresponsive\]). A score of 0 to 3 was allocated to each parameter except supplemental oxygen use (score of 0 or 2) and level of consciousness (score of 0 \[alert, normal health condition\] or 3 \[altered mental state/confusion, worst health condition\]). All parameter scores were summed to get an aggregate NEWS assessment. Scoring for NEWS ranges from 0 to 20, with higher scores meaning more severity/higher clinical risk: low risk (score 1 to 4); medium risk (score 5 to 6); high risk (score 7 to 20). The analysis is performed by using a linear MMRM. |
| Percentage of Participants Who Required At Least One COVID-19 Related Medically Attended Visit (MAV) for Management/Treatment of COVID-19 Which May Have Occurred in Any Setting Through Day 29 | Up to Day 29 | MAV for management/treatment of COVID-19 may have occurred in any setting e.g., emergency department, urgent care, outpatient clinic, or professional setting wherein direct in-person/telemedicine medical assessment and escalation of care for COVID-19 was provided by licensed healthcare personnel. The percentage of participants requiring at least one COVID-19-related MAV for management/treatment of COVID-19 (apart from routinely scheduled study-directed visits) within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
| Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Baseline to Day 7 and Day 14 | Mean change from baseline (CFB) in log10 SARS-CoV-2 viral load at Days 7 and 14 was assessed. |
| Duration of Hospital Stay Through Day 29 | Up to Day 29 | The duration (number of days) of hospitalization from post-randomization through Day 29 was calculated based on hospital admission and discharge dates recorded. |
| Percentage of Participants Who Required Intensive Care Unit (ICU) Admission or Initiation of ICU Level Care Through Day 29 | Up to Day 29 | The percentage of participants requiring ICU admission through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. ICU level care is defined as the medical need for intensive or invasive monitoring; the immediate or impending need for the support of the airway, breathing, or circulation; and/or stabilization of acute severe, or life-threatening complications of COVID-19. |
| Duration of ICU Stay Through Day 29 | Up to Day 29 | The duration (number of days) of ICU stay from post-randomization through Day 29 was calculated based on ICU admission and discharge dates recorded. |
| Percentage of Participants Requiring Invasive Mechanical Ventilation Through Day 29 | Up to Day 29 | The percentage of participants requiring invasive mechanical ventilation through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
| Duration of Invasive Mechanical Ventilation Through Day 29 | Up to Day 29 | The duration (number of days) on invasive mechanical ventilation from post randomization through Day 29 was calculated based on the start/stop dates of invasive mechanical ventilation. |
| All-Cause Mortality Through Day 29 | Up to Day 29 | All-cause mortality rate is the percentage of participants in each treatment group who experienced mortality up to Day 29. |
| Percentage of Participants With Critical COVID-19 Illness | Up to Day 29 | Critical COVID-19 illness was defined as any one of the following: (a) requiring ICU admission or ICU level of care, (b) invasive mechanical ventilation, or (c) resulting in death by Day 29. The percentage of participants with critical COVID-19 illness defined above within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
| Length of Time to Clinical Progression to Critical COVID-19 Illness Through Day 29 | Up to Day 29 | Length of time to clinical progression to critical COVID-19 illness was defined as the time to death, invasive mechanical ventilation, or ICU admission/requiring ICU level of care. ICU level care is defined as the medical need for intensive or invasive monitoring; the immediate or impending need for the support of the airway, breathing, or circulation; and/or stabilization of acute severe, or life-threatening complications of COVID-19. The time to clinical progression was estimated using the KM method. |
| Time to COVID-19 Symptoms Through Day 14 | Up to Day 14 | Participants were described as symptomatic if they a. experienced at least two of the following systemic symptoms: fever (≥38℃), chills, myalgia, headache, sore throat, cough, fatigue that interferes with activities of daily living, new olfactory/taste disorder(s), and vomiting/diarrhea, b. experienced at least one of the following respiratory signs/symptoms: new or worsening shortness of breath or difficulty breathing, c. experienced a peripheral oxygen saturation by pulse oximetry (SpO2) \<94% on room air, or d. had radiographical evidence of pneumonia. Time to COVID-19 symptoms was defined as the time from study drug administration to the first time point when any of the above elements was fulfilled through Day 14. The time to COVID-19 symptoms was estimated using the KM method. |
| Percentage of Participants Who Required Hospital Admission for Medical Care (Non-Quarantine Purposes) Through Day 29 | Up to Day 29 | The percentage of participants requiring hospital admission through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. |
Countries
Spain
Participant flow
Recruitment details
Participants were enrolled in the study at 5 centers in Spain. The study was conducted from 28 April 2021 to 27 December 2021.
Pre-assignment details
Participants with Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-Cov-2) infection were randomized in 1:1:1 ratio to receive anti-COVID-19 Immune Globulin (Human) 20% \[C19-IG 20%\] 1 gram (g), C19-IG 20% 2 g, and placebo. A total of 555 participants were screened and 465 participants were randomized in the study. Among these, 461 participants were dosed, and 430 participants completed the study.
Participants by arm
| Arm | Count |
|---|---|
| C19-IG 20% 1 g Participants received 1 g of C19-IG 20% SC infusion containing one syringe of 5 mL C19-IG 20% plus one syringe of 5 mL sterile 0.9% NaCl on Day 1. | 152 |
| C19-IG 20% 2 g Participants received 2 g of C19-IG 20% SC infusion containing two syringes 5 mL each of C19-IG 20% on Day 1. | 153 |
| Placebo Participants received C19-IG 20% matching placebo as SC infusion containing two syringes of 5 mL each sterile 0.9% NaCl injection on Day 1. | 156 |
| Total | 461 |
Withdrawals & dropouts
| Period | Reason | FG000 | FG001 | FG002 |
|---|---|---|---|---|
| Overall Study | Adverse Event | 1 | 0 | 1 |
| Overall Study | Lost to Follow-up | 7 | 5 | 7 |
| Overall Study | Reason not Specified | 0 | 1 | 0 |
| Overall Study | Withdrawal by Subject | 2 | 4 | 3 |
Baseline characteristics
| Characteristic | C19-IG 20% 1 g | C19-IG 20% 2 g | Placebo | Total |
|---|---|---|---|---|
| Age, Continuous | 38.8 years STANDARD_DEVIATION 12.76 | 41.1 years STANDARD_DEVIATION 12.4 | 38.8 years STANDARD_DEVIATION 13.33 | 39.6 years STANDARD_DEVIATION 12.86 |
| Ethnicity (NIH/OMB) Hispanic or Latino | 40 Participants | 32 Participants | 45 Participants | 117 Participants |
| Ethnicity (NIH/OMB) Not Hispanic or Latino | 112 Participants | 121 Participants | 111 Participants | 344 Participants |
| Ethnicity (NIH/OMB) Unknown or Not Reported | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) American Indian or Alaska Native | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
| Race (NIH/OMB) Asian | 1 Participants | 0 Participants | 3 Participants | 4 Participants |
| Race (NIH/OMB) Black or African American | 4 Participants | 6 Participants | 3 Participants | 13 Participants |
| Race (NIH/OMB) More than one race | 0 Participants | 0 Participants | 1 Participants | 1 Participants |
| Race (NIH/OMB) Native Hawaiian or Other Pacific Islander | 0 Participants | 1 Participants | 0 Participants | 1 Participants |
| Race (NIH/OMB) Unknown or Not Reported | 9 Participants | 6 Participants | 9 Participants | 24 Participants |
| Race (NIH/OMB) White | 138 Participants | 140 Participants | 140 Participants | 418 Participants |
| Sex: Female, Male Female | 66 Participants | 62 Participants | 69 Participants | 197 Participants |
| Sex: Female, Male Male | 86 Participants | 91 Participants | 87 Participants | 264 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk |
|---|---|---|---|
| deaths Total, all-cause mortality | 0 / 152 | 0 / 153 | 0 / 156 |
| other Total, other adverse events | 10 / 152 | 8 / 153 | 5 / 156 |
| serious Total, serious adverse events | 3 / 152 | 7 / 153 | 3 / 156 |
Outcome results
Primary
Percentage of Asymptomatic Participants Who Remained Asymptomatic, i.e., Who Did Not Develop Symptomatic COVID-19 Through Day 14
Participants were described as symptomatic if they a. experienced at least two of the following systemic symptoms: fever (≥38 ºC), chills, myalgia, headache, sore throat, cough, fatigue that interferes with activities of daily living, new olfactory/taste disorder(s), and vomiting/diarrhea, b. experienced at least one of the following respiratory signs/symptoms: new or worsening shortness of breath or difficulty breathing; c. experienced a peripheral oxygen saturation by pulse oximetry (SpO2) \<94% on room air; or d. had radiographical evidence of pneumonia. The percentage of participants who meet the primary endpoint within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% confidence interval (CI).
Time frame: Up to Day 14
Population: mITT population included the subset of ITT participants (all randomized participants) who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Asymptomatic Participants Who Remained Asymptomatic, i.e., Who Did Not Develop Symptomatic COVID-19 Through Day 14 | 59.9 percentage of participants |
| C19-IG 20% 2 g | Percentage of Asymptomatic Participants Who Remained Asymptomatic, i.e., Who Did Not Develop Symptomatic COVID-19 Through Day 14 | 64.7 percentage of participants |
| Placebo | Percentage of Asymptomatic Participants Who Remained Asymptomatic, i.e., Who Did Not Develop Symptomatic COVID-19 Through Day 14 | 63.5 percentage of participants |
p-value: 0.516795% CI: [-14.6, 7.4]Chi-squared
p-value: 0.819795% CI: [-9.6, 12]Chi-squared
Secondary
Absolute Value Score on a 7-point Ordinal Scale
The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or extracorporeal membrane oxygenation (ECMO); 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities. A higher score indicates less severity.
Time frame: Baseline, Day 7, 14, and 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with data available at the given time point.
| Arm | Measure | Group | Value (MEAN) | Dispersion |
|---|---|---|---|---|
| C19-IG 20% 1 g | Absolute Value Score on a 7-point Ordinal Scale | Day 14 | 7.0 score on a scale | Standard Deviation 0.32 |
| C19-IG 20% 1 g | Absolute Value Score on a 7-point Ordinal Scale | Day 7 | 7.0 score on a scale | Standard Deviation 0.08 |
| C19-IG 20% 1 g | Absolute Value Score on a 7-point Ordinal Scale | Day 29 | 7.0 score on a scale | Standard Deviation 0.2 |
| C19-IG 20% 1 g | Absolute Value Score on a 7-point Ordinal Scale | Baseline | 7.0 score on a scale | Standard Deviation 0 |
| C19-IG 20% 2 g | Absolute Value Score on a 7-point Ordinal Scale | Day 7 | 7.0 score on a scale | Standard Deviation 0.16 |
| C19-IG 20% 2 g | Absolute Value Score on a 7-point Ordinal Scale | Day 29 | 7.0 score on a scale | Standard Deviation 0.14 |
| C19-IG 20% 2 g | Absolute Value Score on a 7-point Ordinal Scale | Baseline | 7.0 score on a scale | Standard Deviation 0.08 |
| C19-IG 20% 2 g | Absolute Value Score on a 7-point Ordinal Scale | Day 14 | 6.9 score on a scale | Standard Deviation 0.48 |
| Placebo | Absolute Value Score on a 7-point Ordinal Scale | Baseline | 7.0 score on a scale | Standard Deviation 0.08 |
| Placebo | Absolute Value Score on a 7-point Ordinal Scale | Day 29 | 7.0 score on a scale | Standard Deviation 0.08 |
| Placebo | Absolute Value Score on a 7-point Ordinal Scale | Day 14 | 7.0 score on a scale | Standard Deviation 0.08 |
| Placebo | Absolute Value Score on a 7-point Ordinal Scale | Day 7 | 7.0 score on a scale | Standard Deviation 0.19 |
Secondary
All-Cause Mortality Through Day 29
All-cause mortality rate is the percentage of participants in each treatment group who experienced mortality up to Day 29.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (COUNT_OF_PARTICIPANTS) |
|---|---|---|
| C19-IG 20% 1 g | All-Cause Mortality Through Day 29 | 0 Participants |
| C19-IG 20% 2 g | All-Cause Mortality Through Day 29 | 0 Participants |
| Placebo | All-Cause Mortality Through Day 29 | 0 Participants |
Secondary
Change From Baseline in National Early Warning Score (NEWS)
The NEWS has demonstrated an ability to classify participants at risk of poor outcomes. This score is based on 7 clinical parameters (respiration rate, oxygen saturation, any supplemental oxygen, temperature, systolic blood pressure (BP), heart rate, level of consciousness \[Alert, Voice, Pain, Unresponsive\]). A score of 0 to 3 was allocated to each parameter except supplemental oxygen use (score of 0 or 2) and level of consciousness (score of 0 \[alert, normal health condition\] or 3 \[altered mental state/confusion, worst health condition\]). All parameter scores were summed to get an aggregate NEWS assessment. Scoring for NEWS ranges from 0 to 20, with higher scores meaning more severity/higher clinical risk: low risk (score 1 to 4); medium risk (score 5 to 6); high risk (score 7 to 20). The analysis is performed by using a linear MMRM.
Time frame: Baseline to Day 7, Day 14, and Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with a non-missing NEWS total score at the given time point.
| Arm | Measure | Group | Value (LEAST_SQUARES_MEAN) |
|---|---|---|---|
| C19-IG 20% 1 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 7 | 0.70 score on a scale |
| C19-IG 20% 1 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 29 | 0.61 score on a scale |
| C19-IG 20% 1 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 14 | 0.68 score on a scale |
| C19-IG 20% 2 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 7 | 0.78 score on a scale |
| C19-IG 20% 2 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 14 | 0.65 score on a scale |
| C19-IG 20% 2 g | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 29 | 0.59 score on a scale |
| Placebo | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 7 | 0.70 score on a scale |
| Placebo | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 29 | 0.46 score on a scale |
| Placebo | Change From Baseline in National Early Warning Score (NEWS) | Change from Baseline at Day 14 | 0.67 score on a scale |
Comparison: Day 7p-value: 0.971395% CI: [-0.28, 0.27]Kenward-Roger
Comparison: Day 7p-value: 0.598595% CI: [-0.2, 0.35]Kenward-Roger
Comparison: Day 14p-value: 0.920995% CI: [-0.25, 0.28]Kenward-Roger
Comparison: Day 14p-value: 0.918195% CI: [-0.28, 0.25]Kenward-Roger
Comparison: Day 29p-value: 0.244395% CI: [-0.11, 0.41]Kenward-Roger
Comparison: Day 29p-value: 0.323395% CI: [-0.13, 0.39]Kenward-Roger
Secondary
Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL)
Mean change from baseline (CFB) in log10 SARS-CoV-2 viral load at Days 7 and 14 was assessed.
Time frame: Baseline to Day 7 and Day 14
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with data available for analysis at the given time point.
| Arm | Measure | Group | Value (LEAST_SQUARES_MEAN) |
|---|---|---|---|
| C19-IG 20% 1 g | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 7 | -1.49 log10 copies/mL |
| C19-IG 20% 1 g | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 14 | -2.80 log10 copies/mL |
| C19-IG 20% 2 g | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 7 | -1.76 log10 copies/mL |
| C19-IG 20% 2 g | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 14 | -3.02 log10 copies/mL |
| Placebo | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 7 | -1.59 log10 copies/mL |
| Placebo | Change From Baseline in SARS-CoV-2 Viral Load (log10 Copies/mL) | Change from Baseline at Day 14 | -2.91 log10 copies/mL |
Comparison: Day 7p-value: 0.575695% CI: [-0.24, 0.44]ANCOVA
Comparison: Day 7p-value: 0.328995% CI: [-0.52, 0.17]ANCOVA
Comparison: Day 14p-value: 0.341895% CI: [-0.12, 0.34]ANCOVA
Comparison: Day 14p-value: 0.368895% CI: [-0.34, 0.13]ANCOVA
Secondary
Duration of Any Oxygen Use Through Day 29
The duration (number of days) of any oxygen use from Day 1 through Day 29 was calculated based on the start/stop date of using oxygen supplementation.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the number of participants who required oxygen supplementation.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Duration of Any Oxygen Use Through Day 29 | 7.0 days |
| C19-IG 20% 2 g | Duration of Any Oxygen Use Through Day 29 | 7.0 days |
| Placebo | Duration of Any Oxygen Use Through Day 29 | 9.5 days |
p-value: 0.855595% CI: [-0.23, 0.27]ANCOVA
p-value: 0.810895% CI: [-0.22, 0.28]ANCOVA
Secondary
Duration of Hospital Stay Through Day 29
The duration (number of days) of hospitalization from post-randomization through Day 29 was calculated based on hospital admission and discharge dates recorded.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the number of participants who were hospitalized.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Duration of Hospital Stay Through Day 29 | 9.0 days |
| C19-IG 20% 2 g | Duration of Hospital Stay Through Day 29 | 10.0 days |
| Placebo | Duration of Hospital Stay Through Day 29 | 9.0 days |
p-value: 0.948595% CI: [-0.38, 0.4]ANCOVA
p-value: 0.473495% CI: [-0.25, 0.54]ANCOVA
Secondary
Duration of ICU Stay Through Day 29
The duration (number of days) of ICU stay from post-randomization through Day 29 was calculated based on ICU admission and discharge dates recorded.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the number of participants who were admitted to the ICU.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Duration of ICU Stay Through Day 29 | 7.0 days |
| C19-IG 20% 2 g | Duration of ICU Stay Through Day 29 | 5.0 days |
| Placebo | Duration of ICU Stay Through Day 29 | 3.0 days |
p-value: 0.57895% CI: [-0.07, 0.12]ANCOVA
p-value: 0.906595% CI: [-0.09, 0.1]ANCOVA
Secondary
Duration of Invasive Mechanical Ventilation Through Day 29
The duration (number of days) on invasive mechanical ventilation from post randomization through Day 29 was calculated based on the start/stop dates of invasive mechanical ventilation.
Time frame: Up to Day 29
Population: No participants required mechanical ventilation throughout the study duration.
Secondary
Length of Time to Clinical Progression to Critical COVID-19 Illness Through Day 29
Length of time to clinical progression to critical COVID-19 illness was defined as the time to death, invasive mechanical ventilation, or ICU admission/requiring ICU level of care. ICU level care is defined as the medical need for intensive or invasive monitoring; the immediate or impending need for the support of the airway, breathing, or circulation; and/or stabilization of acute severe, or life-threatening complications of COVID-19. The time to clinical progression was estimated using the KM method.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the participants who had clinical progression through Day 29. Participants who did not meet the criteria for clinical progression were right censored as of the date of last participant's contact on or prior to Day 29.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Length of Time to Clinical Progression to Critical COVID-19 Illness Through Day 29 | NA days |
| C19-IG 20% 2 g | Length of Time to Clinical Progression to Critical COVID-19 Illness Through Day 29 | NA days |
| Placebo | Length of Time to Clinical Progression to Critical COVID-19 Illness Through Day 29 | NA days |
Secondary
Mean Change From Baseline in the 7-point Ordinal Scale
The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or ECMO; 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities. A higher score indicates less severity. The analysis was performed by using a linear mixed-effects model for repeated measures (MMRM).
Time frame: Baseline to Day 7, Day 14, and Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with data available at the given time point.
| Arm | Measure | Group | Value (LEAST_SQUARES_MEAN) |
|---|---|---|---|
| C19-IG 20% 1 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 29 | -0.04 score on a scale |
| C19-IG 20% 1 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 7 | -0.00 score on a scale |
| C19-IG 20% 1 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 14 | -0.05 score on a scale |
| C19-IG 20% 2 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 14 | -0.07 score on a scale |
| C19-IG 20% 2 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 29 | -0.02 score on a scale |
| C19-IG 20% 2 g | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 7 | -0.02 score on a scale |
| Placebo | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 7 | -0.04 score on a scale |
| Placebo | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 29 | -0.00 score on a scale |
| Placebo | Mean Change From Baseline in the 7-point Ordinal Scale | Change from Baseline at Day 14 | -0.00 score on a scale |
Comparison: Day 7p-value: 0.069295% CI: [0, 0.07]Kenward-Roger
Comparison: Day 7p-value: 0.495695% CI: [-0.02, 0.05]Kenward-Roger
Comparison: Day 14p-value: 0.2295% CI: [-0.13, 0.03]Kenward-Roger
Comparison: Day 14p-value: 0.090695% CI: [-0.14, 0.01]Kenward-Roger
Comparison: Day 29p-value: 0.043995% CI: [-0.07, 0]Kenward-Roger
Comparison: Day 29p-value: 0.412895% CI: [-0.05, 0.02]Kenward-Roger
Secondary
Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale
The ordinal scale is a 7-point scale ranging from 1 to 7 used to measure clinical status of a participant based on the following points: 1) death; 2) hospitalized, on invasive mechanical ventilation or ECMO; 3) hospitalized, on non-invasive ventilation or high flow oxygen devices; 4) hospitalized, requiring supplemental oxygen; 5) hospitalized, not requiring supplemental oxygen; 6) not hospitalized, limitation on activities; and 7) not hospitalized, no limitations on activities.
Time frame: Days 1, 7, 14, and 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with data available at the given time point in each treatment group. The percentage values are rounded off to the nearest decimal point.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, no limitations on activities | 95.8 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, not requiring supplemental oxygen | 0.7 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, no limitations on activities | 100 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, limitation on activities | 4.2 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, limitation on activities | 1.4 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, limitation on activities | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Death | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, limitation on activities | 0.7 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, no limitations on activities | 97.3 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Death | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, no limitations on activities | 99.3 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Death | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, requiring supplemental oxygen | 0.7 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Death | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, no limitations on activities | 99.3 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, limitation on activities | 2.7 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, no limitations on activities | 97.3 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Death | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, limitation on activities | 2.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Death | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, limitation on activities | 2.1 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, no limitations on activities | 97.9 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Death | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, limitation on activities | 0.7 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Death | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 1.4 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, no limitations on activities | 96.6 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Death | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Death | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, no limitations on activities | 99.4 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, no limitations on activities | 96.1 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Death | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Not hospitalized, limitation on activities | 3.9 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, no limitations on activities | 99.3 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Death | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, no limitations on activities | 99.3 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Not hospitalized, limitation on activities | 0.7 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, not requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 1: Not hospitalized, limitation on activities | 0.6 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 29: Not hospitalized, limitation on activities | 0.7 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, requiring supplemental oxygen | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on non-invasive ventilation or high flow oxygen devices | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 14: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
| Placebo | Percentage of Participants in Each Severity Category of the 7-point Ordinal Scale | Day 7: Hospitalized, on invasive mechanical ventilation/ ECMO | 0.0 percentage of participants |
Secondary
Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29
The percentage of participants with negative SARS-CoV-2 by PCR through Day 14 and Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Day 3, Day 7, Day 14, and Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is the number of participants with non-missing test results at the given visit.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 3 | 29.1 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 7 | 37.8 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 14 | 65.2 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 29 | 92.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 29 | 89.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 3 | 30.4 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 14 | 74.1 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 7 | 44.0 percentage of participants |
| Placebo | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 29 | 87.1 percentage of participants |
| Placebo | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 7 | 36.1 percentage of participants |
| Placebo | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 14 | 67.2 percentage of participants |
| Placebo | Percentage of Participants Negative for SARS-CoV-2 by Polymerase Chain Reaction (PCR) Test at Multiple Timepoints Through Day 14 and Through Day 29 | Day 3 | 26.0 percentage of participants |
Comparison: Day 3p-value: 0.548995% CI: [-7.1, 13.3]Chi-squared
Comparison: Day 3p-value: 0.39295% CI: [-5.8, 14.7]Chi-squared
Comparison: Day 7p-value: 0.763295% CI: [-9.5, 12.9]Chi-squared
Comparison: Day 7p-value: 0.170295% CI: [-3.6, 19.2]Chi-squared
Comparison: Day 14p-value: 0.731695% CI: [-13.3, 9.4]Chi-squared
Comparison: Day 14p-value: 0.210495% CI: [-4.2, 18]Chi-squared
Comparison: Day 29p-value: 0.205995% CI: [-2.9, 13.2]Chi-squared
Comparison: Day 29p-value: 0.646395% CI: [-6.5, 10.3]Chi-squared
Secondary
Percentage of Participants Requiring Invasive Mechanical Ventilation Through Day 29
The percentage of participants requiring invasive mechanical ventilation through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Requiring Invasive Mechanical Ventilation Through Day 29 | 0.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Requiring Invasive Mechanical Ventilation Through Day 29 | 0.0 percentage of participants |
| Placebo | Percentage of Participants Requiring Invasive Mechanical Ventilation Through Day 29 | 0.0 percentage of participants |
Secondary
Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14
An outpatient setting was defined as no hospitalization or intensive care unit (ICU) admission through Days 3, 7, and 14. The percentage of participants who remained in an outpatient setting and maintained SpO2 ≥94% on room air at each timepoint within each treatment group were presented along with a two-sided exact (Clopper-Pearson) 95% CI. p-value and 95% CI were not estimable for C19-IG 20% 1 g vs placebo as all participants had remained in an outpatient setting and maintained SpO2 ≥94% on Room Air in C19-IG 20% 1 g and placebo arm on Day 3.
Time frame: Day 3, Day 7, and Day 14
Population: mITT population included the subset of ITT participants who were also dosed. Here, Number analyzed is number of participants with data available for analysis at given timepoint.
| Arm | Measure | Group | Value (NUMBER) |
|---|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 14 | 95.3 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 7 | 100 percentage of participants |
| C19-IG 20% 1 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 3 | 100 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 14 | 94.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 3 | 98.7 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 7 | 96.7 percentage of participants |
| Placebo | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 14 | 96.1 percentage of participants |
| Placebo | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 7 | 98.7 percentage of participants |
| Placebo | Percentage of Participants Who Remained in an Outpatient Setting and Maintained SpO2 ≥94% on Room Air on Day 3, Day 7, and Day 14 | Day 3 | 100 percentage of participants |
Comparison: Day 3p-value: 0.150695% CI: [-4.7, 1.2]Chi-squared
Comparison: Day 7p-value: 0.165595% CI: [-1.3, 4.6]Chi-squared
Comparison: Day 7p-value: 0.233795% CI: [-6.5, 1.7]Chi-squared
Comparison: Day 14p-value: 0.721295% CI: [-6.1, 4.2]Chi-squared
Comparison: Day 14p-value: 0.389795% CI: [-7.8, 3.1]Chi-squared
Secondary
Percentage of Participants Who Required At Least One COVID-19 Related Medically Attended Visit (MAV) for Management/Treatment of COVID-19 Which May Have Occurred in Any Setting Through Day 29
MAV for management/treatment of COVID-19 may have occurred in any setting e.g., emergency department, urgent care, outpatient clinic, or professional setting wherein direct in-person/telemedicine medical assessment and escalation of care for COVID-19 was provided by licensed healthcare personnel. The percentage of participants requiring at least one COVID-19-related MAV for management/treatment of COVID-19 (apart from routinely scheduled study-directed visits) within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Who Required At Least One COVID-19 Related Medically Attended Visit (MAV) for Management/Treatment of COVID-19 Which May Have Occurred in Any Setting Through Day 29 | 17.1 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Required At Least One COVID-19 Related Medically Attended Visit (MAV) for Management/Treatment of COVID-19 Which May Have Occurred in Any Setting Through Day 29 | 19.0 percentage of participants |
| Placebo | Percentage of Participants Who Required At Least One COVID-19 Related Medically Attended Visit (MAV) for Management/Treatment of COVID-19 Which May Have Occurred in Any Setting Through Day 29 | 14.1 percentage of participants |
p-value: 0.467695% CI: [-5.3, 11.5]Chi-squared
p-value: 0.250795% CI: [-3.6, 13.4]Chi-squared
Secondary
Percentage of Participants Who Required Hospital Admission for Medical Care (Non-Quarantine Purposes) Through Day 29
The percentage of participants requiring hospital admission through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Who Required Hospital Admission for Medical Care (Non-Quarantine Purposes) Through Day 29 | 2.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Required Hospital Admission for Medical Care (Non-Quarantine Purposes) Through Day 29 | 4.6 percentage of participants |
| Placebo | Percentage of Participants Who Required Hospital Admission for Medical Care (Non-Quarantine Purposes) Through Day 29 | 1.9 percentage of participants |
p-value: 0.974495% CI: [-3.8, 4]Chi-squared
p-value: 0.187895% CI: [-1.6, 7.5]Chi-squared
Secondary
Percentage of Participants Who Required Intensive Care Unit (ICU) Admission or Initiation of ICU Level Care Through Day 29
The percentage of participants requiring ICU admission through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI. ICU level care is defined as the medical need for intensive or invasive monitoring; the immediate or impending need for the support of the airway, breathing, or circulation; and/or stabilization of acute severe, or life-threatening complications of COVID-19.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Who Required Intensive Care Unit (ICU) Admission or Initiation of ICU Level Care Through Day 29 | 0.66 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Required Intensive Care Unit (ICU) Admission or Initiation of ICU Level Care Through Day 29 | 0.65 percentage of participants |
| Placebo | Percentage of Participants Who Required Intensive Care Unit (ICU) Admission or Initiation of ICU Level Care Through Day 29 | 0.64 percentage of participants |
p-value: 0.985395% CI: [-3.05, 3.12]Chi-squared
p-value: 0.98995% CI: [-2.99, 3.07]Chi-squared
Secondary
Percentage of Participants Who Required Oxygen (O2) Supplementation on or Before Day 29
The percentage of participants requiring oxygen supplementation through Day 29 within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants Who Required Oxygen (O2) Supplementation on or Before Day 29 | 2.0 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants Who Required Oxygen (O2) Supplementation on or Before Day 29 | 3.9 percentage of participants |
| Placebo | Percentage of Participants Who Required Oxygen (O2) Supplementation on or Before Day 29 | 1.3 percentage of participants |
p-value: 0.631195% CI: [-2.9, 4.6]Chi-squared
p-value: 0.144195% CI: [-1.2, 7.3]Chi-squared
Secondary
Percentage of Participants With Critical COVID-19 Illness
Critical COVID-19 illness was defined as any one of the following: (a) requiring ICU admission or ICU level of care, (b) invasive mechanical ventilation, or (c) resulting in death by Day 29. The percentage of participants with critical COVID-19 illness defined above within each treatment group was presented along with a two-sided exact (Clopper-Pearson) 95% CI.
Time frame: Up to Day 29
Population: mITT population included the subset of ITT participants who were also dosed.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| C19-IG 20% 1 g | Percentage of Participants With Critical COVID-19 Illness | 0.66 percentage of participants |
| C19-IG 20% 2 g | Percentage of Participants With Critical COVID-19 Illness | 0.65 percentage of participants |
| Placebo | Percentage of Participants With Critical COVID-19 Illness | 0.64 percentage of participants |
p-value: 0.985395% CI: [-3.05, 3.12]Chi-squared
p-value: 0.98995% CI: [-2.99, 3.07]Chi-squared
Secondary
Time to COVID-19 Symptoms Through Day 14
Participants were described as symptomatic if they a. experienced at least two of the following systemic symptoms: fever (≥38℃), chills, myalgia, headache, sore throat, cough, fatigue that interferes with activities of daily living, new olfactory/taste disorder(s), and vomiting/diarrhea, b. experienced at least one of the following respiratory signs/symptoms: new or worsening shortness of breath or difficulty breathing, c. experienced a peripheral oxygen saturation by pulse oximetry (SpO2) \<94% on room air, or d. had radiographical evidence of pneumonia. Time to COVID-19 symptoms was defined as the time from study drug administration to the first time point when any of the above elements was fulfilled through Day 14. The time to COVID-19 symptoms was estimated using the KM method.
Time frame: Up to Day 14
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the number of participants who experienced symptoms through Day 14.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Time to COVID-19 Symptoms Through Day 14 | NA days |
| C19-IG 20% 2 g | Time to COVID-19 Symptoms Through Day 14 | NA days |
| Placebo | Time to COVID-19 Symptoms Through Day 14 | NA days |
Secondary
Time to Negative SARS-CoV-2 PCR From Baseline Through Day 29
The first negative test result was defined as the first PCR negative result after the first PCR positive result. Kaplan-Meier method was used for analysis. Participants who did not have any viral load data or had negative test results through the study were excluded from the KM analysis.
Time frame: Baseline to Day 29
Population: mITT population included the subset of ITT participants who were also dosed. Here, Overall number of participants analyzed is the participants who achieved negative test results through Day 29.
| Arm | Measure | Value (MEDIAN) |
|---|---|---|
| C19-IG 20% 1 g | Time to Negative SARS-CoV-2 PCR From Baseline Through Day 29 | 14 days |
| C19-IG 20% 2 g | Time to Negative SARS-CoV-2 PCR From Baseline Through Day 29 | 14 days |
| Placebo | Time to Negative SARS-CoV-2 PCR From Baseline Through Day 29 | 14 days |
p-value: 0.9033Log Rank
p-value: 0.5456Log Rank