Intramuscular and Intravenous VIR-7831 (Sotrovimab) for Mild/Moderate COVID-19.

Phase 3

Terminated

Conditions: Covid19

Interventions: Biological: Sotrovimab

Registration Number: NCT04913675

Lead Sponsor: Vir Biotechnology, Inc.

Brief Summary: The COMET-TAIL main study evaluated efficacy, safety, and tolerability of IM sotrovimab versus IV sotrovimab in high-risk patients for the treatment of mild/moderate COVID-19. In the safety substudy, the aim was to evaluate the safety and tolerability of sotrovimab across a single ascending dose level and over different infusion times when given for the treatment of mild/moderate COVID-19 to participants at high risk of disease progression

Main study was completed successfully. The safety sub-study was discontinued early in the context of evolving variants with increased fold changes in the in vitro half maximal inhibitory concentration (IC50) and uncertainty in the clinical relevance of these changes.

Detailed Description: Not available

Recruitment & Eligibility

Status: TERMINATED

Sex: All

Target Recruitment: 1065

Inclusion Criteria

Main Study participant must be aged 12 years or older AND at high risk of progression of COVID-19 or > 55 years old
Sub-Study participants must be aged 18 years or older at time of consent AND at high risk of progression of COVID-19 or ≥ 55 years old
Participants must have a positive SARS-CoV-2 test result and oxygen saturation ≥94% on room air and have COVID-19 symptoms and be less than or equal to 7 days from onset of symptoms

Exclusion Criteria

Currently hospitalized or judged by the investigator as likely to require hospitalization in the next 24 hours
Symptoms consistent with severe COVID-19
Participants who, in the judgement of the investigator are likely to die in the next 7 days
Known hypersensitivity to any constituent present in the investigational product

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Substudy (Optional Cohort B1) - Sotrovimab 2000 mg IV	Sotrovimab	-
Main Study - Sotrovimab 500 mg IV	Sotrovimab	-
Main Study - Sotrovimab 500 mg IM	Sotrovimab	-
Substudy (Cohort A) - Sotrovimab 2000 mg IV	Sotrovimab	-
Main Study - Sotrovimab 250 mg IM	Sotrovimab	-
Substudy (Optional Cohort B2) - Sotrovimab 2000 mg IV	Sotrovimab	-
Substudy (Optional Cohort C) - Sotrovimab up to 3000 mg IV	Sotrovimab	-

Primary Outcome Measures

Name	Time	Method
Main Study: Percentage of Participants Who Had Progression of Coronavirus Disease 2019 (COVID-19) Through Day 29 by Hospitalization >24 Hours or Death Due to Any Cause (Weekly and Daily Imputation)	Up to Day 29	Progression of COVID-19 through Day 29 as defined by hospitalization \>24 hours for acute management of illness due to any cause or death. Percentage values are rounded off.
Safety Sub-study: Number of Participants With Any Disease Related Events Through Day 8	Up to Day 8	AEs related to expected progression, signs, or symptoms of COVID-19, unless more severe than expected for the participant's current clinical status and medical history, were reported as a disease related events.
Safety Sub-study: Number of Participants With Infusion-related Reaction Including Hypersensitivity Through Day 8	Up to Day 8	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. Adverse events of special interest (AESI) included infusion-related reaction including hypersensitivity. Data for number of participants with infusion-related reaction including hypersensitivity has been presented.
Safety Sub-study: Number of Participants With Non-Serious Adverse Events (Non-SAE) and Serious Adverse Events (SAEs) Through Day 8	Up to Day 8	An adverse event (AE) is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. An SAE is defined as any serious adverse event that, at any dose: results in death; is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or any other situation according to medical or scientific judgement. Adverse events which were not Serious were considered as Non-Serious adverse events.

Secondary Outcome Measures

Name	Time	Method
Main Study: Number of Participants With Any Disease Related Events	Up to Week 36	AEs related to expected progression, signs, or symptoms of COVID-19, unless more severe than expected for the participant's current clinical status and medical history, were reported as a disease related events.
Safety Sub-study: Number of Participants With Any Infusion-related Reaction Including Hypersensitivity Through Week 12	Up to Week 12	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. AESI is infusion-related reaction including hypersensitivity.
Safety Sub-study: Number of Participants With Any Disease Related Events Through Week 12	Up to Week 12	AEs related to expected progression, signs, or symptoms of COVID-19, unless more severe than expected for the participant's current clinical status and medical history, were reported as a disease related events.
Main Study: Number of Participants With Any Local Site Reaction by Maximum Severity After IM Administration	Up to Week 36	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. AESIs included any solicited local site reactions. AESI were graded according to the Toxicity Grading Scale for Healthy Adult and Adolescent Volunteers Enrolled in Preventive Vaccine Clinical Trials 2007, Food and Drug Administration, where Grade 1=Mild toxicity; Grade 2=Moderate toxicity; Grade 3=Severe toxicity; and Grade 4= Potentially life-threatening toxicity. Higher Grade indicates higher severity. Data for any worst case post-Baseline has been presented.
Main Study: Titers of Anti-drug Antibodies Against Sotrovimab	Up to Week 24	Confirmed positive ADA samples were further analyzed to obtain the titer of the antibodies. Titer is defined as the reciprocal of the highest dilution that yield results at or above the plate-based titer cut point x MRD. Titer Median and range from treatment emergent and unaffected are described below. Immunogenicity results were categorized as treatment- induced, treatment-boosted, and treatment-unaffected. Treatment-induced=those who are ADA negative or missing data at baseline and who have at least one post-dose ADA positive sample; Treatment boosted=those who are ADA positive at baseline and have a \>4\Baseline titer; Treatment unaffected=those who are positive at baseline and post-Baseline titer \<=4\Baseline titer or all post- Baseline negative. Treatment emergent = treatment induced or treatment boosted
Safety Sub-study: Number of Participants With Positive Neutralizing Antibodies	Up to Week 24	Blood samples were collected for the determination of positive neutralizing antibodies. A neutralizing antibody assay was performed. Neutralizing antibody test was only carried out for participants who have had a positive confirmatory binding antibody test result at visit. A participant was considered positive if they had at least one positive post-Baseline neutralizing antibody result.
Main Study: Mean AUC of SARS-CoV-2 Viral Load From Day 1 to Day 8 After Administration of Sotrovimab 500 mg IV and IM	Day 1 to Day 8	AUC of SARS-CoV-2 viral load was measured by qRT-PCR from Day 1 to Day 8 in nasopharyngeal swab samples. Least squares geometric mean and 90 percent (%) confidence interval has been presented.
Main Study: Percentage of Participants With Persistently High SARS-CoV-2 Viral Load at Day 8	At Day 8	Percentage of participants with a persistently high viral load were categorized as \>=4.1 log10 copies/mL and \<4.1 log10 copies/mL. Percentage of participants with a persistently high SARS-CoV-2 viral load at Day 8 was assessed via qRT-PCR in nasopharyngeal swab samples. Percentage values are rounded off.
Main Study: Number of Participants With Common Non-Serious Adverse Events (Non-SAEs)	Up to Week 12	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. Data for Common (\>=1%) non-SAEs are presented.
Main Study: Serum Concentration of Sotrovimab After Intramuscular Administration	Day 1: Pre-dose, Day 8, Day 15, Day 29, Week 12, Week 20 and Week 24	Blood samples were collected at indicated time points for PK analysis of Sotrovimab.
Safety Sub-study: Terminal Elimination Half-life of Sotrovimab After Intravenous Administration (t1/2)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Main Study: Number of Participants With Serious Adverse Events (SAEs)	Up to Week 36	An SAE is defined as any serious adverse event that, at any dose: results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, significant medical events that may jeopardize the participant or require medical or surgical intervention to prevent one of the other outcomes listed before.
Main Study: Number of Participants With Any Infusion- or Injection-related Reaction Including Hypersensitivity	Up to Week 36	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. AESI included infusion- or injection-related reaction including hypersensitivity. Data for number of participants with any infusion- or injection-related reaction including hypersensitivity has been presented.
Safety Sub-study: Number of Participants With Non-SAEs Through Week 12	Up to Week 12	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. Adverse events which were no serious, were considered as non-SAEs.
Main Study: Number of Participants With Treatment-emergent Positive Anti-drug Antibody	Up to Week 24	Serum samples were collected for the determination of anti-drug antibodies (ADA) using a validated electrochemiluminescent (ECL) immunoassay. The assay involved screening, confirmation and titration steps. If serum samples tested positive in the screening assay, they were considered 'potentially positive' and were further analyzed for specificity using the confirmation assay. Samples that confirmed positive in the confirmation assay were reported as 'positive'. Confirmed positive ADA samples were further characterized in the titration assay to quasi-quantitate the amount of ADA in the sample.
Safety Sub-study: Titers of Anti-drug Antibodies Against Sotrovimab Through Week 24	Up to Week 24	Confirmed positive ADA samples were further analyzed to obtain the titer of the antibodies. Titer is defined as the reciprocal of the highest dilution that yield results at or above the plate-based titer cut point x MRD. Titer Median and range from treatment emergent and unaffected are described below. Immunogenicity results were categorized as treatment- induced, treatment-boosted, and treatment-unaffected. Treatment-induced=those who are ADA negative or missing data at baseline and who have at least one post-dose ADA positive sample; Treatment boosted=those who are ADA positive at baseline and have a \>4\Baseline titer; Treatment unaffected=those who are positive at baseline and post-Baseline titer \<=4\Baseline titer or all post- Baseline negative. Treatment emergent = treatment induced or treatment boosted
Main Study: Percentage of Participants Who Progress to Develop Severe and/or Critical Respiratory COVID-19 by Visit	Day 8, Day 15, Day 22, and Day 29	Participants were defined as progressing to develop severe respiratory COVID-19 if they required supplemental oxygen either by nasal cannula, face mask, high-flow oxygen devices, or non-invasive ventilation. Participants were defined as progressing to develop critical respiratory COVID-19 if they required invasive mechanical ventilation or extracorporeal membrane oxygenation. Percentage values are rounded off.
Main Study: Change From Baseline in Viral Load as Measured by qRT-PCR at Day 8	Baseline (Day 1) and at Day 8	Viral load was based on nasopharyngeal swab samples and was measured by qRT-PCR. Baseline was defined as the latest non-missing value prior to dosing (or latest value on or prior to nominal Day 1 for participants that were not dosed). Change from Baseline was calculated by subtracting the Baseline value from the post-dose visit value.
Safety Sub-study: Area Under the Serum Concentration-time Curve From Days 1 to 29 of After Intravenous Administration (AUCD1-29) of Sotrovimab	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Number of Participants With SAEs Through Week 36	Up to Week 36	An SAE is defined as any serious adverse event that, at any dose: results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, or any other situation according to medical or scientific judgement.
Main Study: Mean Area Under the Curve (AUC) of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) Viral Load From Day 1 to Day 8	Day 1 to Day 8	AUC of SARS-CoV-2 viral load was measured by Quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) from Day 1 to Day 8 in nasopharyngeal swab samples.
Main Study: Serum Concentration of Sotrovimab After Intravenous Administration	Day 1: Pre-dose, Day 8, Day 15, Day 29, Week 12, Week 20 and Week 24	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab.
Safety Sub-study: Serum Concentration of Sotrovimab After Intravenous Administration	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab.
Safety Sub-study: Maximum Serum Concentration of Sotrovimab After Intravenous Administration (Cmax)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Number of Participants With Treatment-emergent Positive Anti-drug Antibody Through Week 24	Up to Week 24	Serum samples were collected for the determination of anti-drug antibodies (ADA) using a validated electrochemiluminescent (ECL) immunoassay. The assay involved screening, confirmation and titration steps. If serum samples tested positive in the screening assay, they were considered 'potentially positive' and were further analyzed for specificity using the confirmation assay. Samples that confirmed positive in the confirmation assay were reported as 'positive'. Confirmed positive ADA samples were further characterized in the titration assay to quasi-quantitate the amount of ADA in the sample.
Main Study: Percentage of Participants Who Had Progression of COVID-19 Through Day 29 by Emergency Room Visit or Hospitalization or Death (Weekly Imputation)	Up to Day 29	Progression of COVID-19 through Day 29 as defined by visit to a hospital emergency room for management of illness or hospitalization for acute management of illness for any duration and for any cause or death. Percentage values are rounded off.
Safety Sub-study: Apparent Volume of Distribution at Steady State of Sotrovimab After Intravenous Administration (Vss)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Clearance of Sotrovimab After Intravenous Administration (CL)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Area Under the Serum Concentration-Time Curve Extrapolated From Zero to Infinity of Sotrovimab After Intravenous Administration (AUC[0-inf])	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Apparent Volume of Distribution During the Elimination Phase of Sotrovimab After Intravenous Administration (Vz)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.
Safety Sub-study: Time to Reach Maximum Serum Concentration of Sotrovimab After Intravenous Administration (Tmax)	Day 1: Pre-dose and end of infusion; Days 3, 5, 8, 15, 29 post-dose, Weeks 12, 20 and 24 post-dose	Blood samples were collected at indicated time points for pharmacokinetic (PK) analysis of Sotrovimab. Pharmacokinetic analysis of sotrovimab was conducted using non-compartmental method.