A Study to Investigate the PK, Safety, and Tolerability of Sotrovimab vs Placebo Administered IV or IM in Japanese and Caucasian Participants

Phase 1

Completed

Conditions: Covid19

Interventions: Other: Placebo to Biologic
Biological: sotrovimab

Registration Number: NCT04988152

Lead Sponsor: Vir Biotechnology, Inc.

Brief Summary: This is a Phase I single-dose study to investigate the pharmacokinetics, safety, and tolerability of sotrovimab vs placebo by intravenous or intramuscular administration in healthy Japanese and Caucasian participants.

Detailed Description: The purpose of this study is to evaluate the safety, tolerability, and pharmacokinetics (PK) of a single fixed dose of sotrovimab administered intravenously (IV) or via intramuscular (IM) injection in Japanese and Caucasian healthy volunteers. This study will occur in two parts (Part 1 and Part 2).

Part 1: Healthy Japanese and Caucasian participants will be randomized in a 4:1 ratio to receive a single IV infusion of sotrovimab or volume-matched saline placebo on Day 1. Participants will be blinded to study intervention. Safety, tolerability, immunogenicity, and PK of IV sotrovimab will be evaluated.

Part 2: Healthy Japanese and Caucasian participants will be randomized in a 4:1 ratio to receive a single IM dose of sotrovimab or volume-matched saline placebo on Day 1. Participants will be blinded to study intervention. Safety, tolerability, immunogenicity, and PK of IM sotrovimab will be evaluated.

The data from this study will be used to supplement data available from other clinical trials that were conducted in non-Japanese participants.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 48

Inclusion Criteria

Male or female participants, aged 18 to 65 years, inclusive
Participants who are healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and cardiac monitoring.
Japanese participants must be of Japanese ancestry, defined as having been born in Japan, being descendants of four ethnic Japanese grandparents and two ethnic Japanese parents, holding a Japanese passport or identity papers, and being able to speak Japanese. Participants should have lived outside Japan for fewer than 10 years at the time of Screening.
Caucasian participants must be of Caucasian ancestry, defined as Caucasian descent as evidenced by appearance and verbal confirmation of familial heritage.
Body mass index (BMI) within the range of 18 to 29.9 kg/m2 (inclusive).
Capable of giving signed informed consent, which includes compliance with the requirements and restrictions listed in the consent form and protocol.

Exclusion Criteria

History or presence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention or interfering with the interpretation of data.
Lymphoma, leukemia, or any malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years.
Breast cancer within the past 10 years.
Abnormal blood pressure at Screening.
Significant allergies to humanized monoclonal antibodies.
Clinically significant multiple or severe drug allergies, intolerance to topical corticosteroids, or severe post-treatment hypersensitivity reactions (including, but not limited to, erythema multiforme major, linear immunoglobulin A (IgA) dermatosis, toxic epidermal necrolysis, and exfoliative dermatitis).
Current or chronic history of liver disease or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones).
Use of any prescription medications (besides contraceptive medications or devices) within the 28 days prior to dosing or concomitantly, unless permitted by the protocol or approved by the Investigator in conjunction with the GSK medical monitor.
Treatment with biologic agents (such as monoclonal antibodies including marketed drugs) within 3 months or 5 half-lives (whichever is longer) prior to dosing.
Receipt of convalescent plasma from a recovered COVID-19 patient or anti-SARSCoV- 2 mAb within the last 3 months.
Receipt of any vaccine within 48 hours prior to enrollment. Vaccination will not be allowed for 90 days after dosing.
Participant has received a SARS-CoV-2 vaccine but has not completed all doses in the series more than 28 days prior to Screening
Participation in the study would result in loss of blood or blood products in excess of 500 mL within a 56 day period.
Exposure to more than 4 new chemical entities within 12 months prior to the first dosing day.
Enrollment in any investigational vaccine study within the last 180 days or any other investigational drug study within 30 days prior to Day 1 or within 5 half-lives of the investigational compound, whichever is longer.
A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 prior to dosing.
Positive pre-study drug/alcohol screen.
Positive HIV antibody test.
History of regular alcohol consumption within 6 months prior to the study defined as: An average weekly intake of >14 units. One unit is equivalent to 8 g of alcohol: a half pint (~240 mL) of beer, 1 glass (125 mL) of wine, or 1 (25 mL) measure of spirits.
Regular use of known drugs of abuse.

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Part 1 Volume-matched placebo, intravenous infusion	Placebo to Biologic	-
Part 2 Sotrovimab intramuscular injection, single dose	sotrovimab	-
Part 1 Sotrovimab intravenous infusion, single dose	sotrovimab	-
Part 2 Volume-matched placebo, intramuscular injection	Placebo to Biologic	-

Primary Outcome Measures

Name	Time	Method
Part 1: Maximum Observed Serum Concentration (Cmax) of Sotrovimab Through Day 29	Day 1: Pre-dose, at end of infusion (EOI) and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Days 8, 15 and 29	The Cmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric means and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using analysis of covariance (ANCOVA) adjusting for body weight. The geometric Least Square (LS) means ratio (Japanese versus Caucasian) for Cmax and 90 percent (%) confidence interval (CI) are presented.
Part 1: Area Under the Serum-concentration Time Curve From Day 1 to Day 29 (AUC[D1-29]) of Sotrovimab	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Days 8, 15 and 29	The AUC (D1-29) was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for AUC(D1-29) and 90% Confidence Interval are presented.
Part 1: Time to Cmax (Tmax) of Sotrovimab Through Day 29	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Days 8, 15 and 29	The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 1: Concentration at Day 29 (CD29) Following Administration of Sotrovimab	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Days 8, 15 and 29	The CD29 was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.
Part 2: Cmax of Sotrovimab Through Day 29	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Days 8, 15 and 29	The Cmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for Cmax and 90% confidence interval are presented.
Part 2: AUC(D1-29) of Sotrovimab	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Days 8, 15 and 29	The AUC (D1-29) was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for AUC(D1-29) and 90% confidence interval are presented.
Part 2: Tmax of Sotrovimab Through Day 29	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Days 8, 15 and 29	The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 2: CD29 of Sotrovimab	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Days 8, 15 and 29	The CD29 was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.
Part 1: Number of Participants With Serious Adverse Events (SAE) and Common Non-serious Adverse Events (Non-SAE) Through Day 29	Up to Day 29	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 situations as per medical or scientific judgment. Adverse events which were not serious adverse events were considered as Non-Serious adverse events.
Part 1: Number of Participants With Adverse Events of Special Interest (AESI) Through Day 29	Up to Day 29	Adverse events of special interest (AESI) are relevant known toxicities of other therapeutic monoclonal antibodies (mAbs) or signals observed in nonclinical programs of sotrovimab. AESI were defined as Infusion-related reactions (IRR) including hypersensitivity reactions, Hypersensitivity Standardized Medical dictionary for Regulatory Activities (MedDRA) Queries (SMQ) narrow, Infusion site reactions, Immunogenicity related adverse drug reactions (ADR) and AE potentially related to antibody-dependent enhancement of disease (ADE). Only IRR including hypersensitivity and Infusion site reactions through Day 29 were summarized.
Part 1: Number of Participants With Abnormal Clinically Significant Electrocardiogram (ECG) Findings Through Day 29	Up to Day 29	Twelve-lead ECG's were obtained in the semi-recumbent or supine position after 10 minutes of rest using an ECG machine. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. Data for the number of participants with abnormal clinically significant worst case post-Baseline ECG findings were reported.
Part 1: Number of Participants With Vital Signs Grade Shifts From Baseline Grade Through Day 29	Baseline (Day 1) and up to Day 29	Vital signs including systolic blood pressure (SBP), diastolic blood pressure (DBP) and pulse rate were measured in a semi-supine or sitting position after 5 minutes rest. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 1: Number of Participants With Clinical Chemistry Grade Shifts From Baseline Grade Through Day 29	Baseline (Day 1) and up to Day 29	Blood samples were collected for analysis of clinical chemistry parameters including Total Bilirubin, Direct Bilirubin, Glucose (fasting) and Glucose. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome (AIDS) Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 1: Number of Participants With Any Increase in Worst-case Urinalysis Results Post-Baseline Relative to Baseline by Dipstick Method Through Day 29	Baseline (Day 1) and up to Day 29	Urine samples were collected for analysis of bilirubin, leukocyte esterase, occult blood, and protein by a dipstick method. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Baseline is defined as the latest pre-dose assessment with a non-missing value on or after Day -1 visit, including those from unscheduled visits. Any increase means any increase to small, moderate, severe, potentially life threatening or positive post-Baseline relative to Baseline. Data is presented for only those parameters for which participants had any increase in urinalysis results post-Baseline relative to Baseline. Number of participants with worst case any increase in urinalysis results post-Baseline relative to Baseline has been presented.
Part 2: Number of Participants With SAE and Common Non-SAE Through Day 29	Part 2: Number of participants with SAE and common non-SAE through Day 29	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. 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 situations as per medical or scientific judgment. Adverse events which were not serious adverse events were considered as Non-Serious adverse events.
Part 2: Number of Participants With AESI Through Day 29	Up to Day 29	Adverse events of special interest (AESI) are relevant known toxicities of other therapeutic mAbs or signals observed in nonclinical programs of sotrovimab. AESI were defined as Injection-related reactions including hypersensitivity reactions, Hypersensitivity (SMQ narrow), Injection site reactions, Immunogenicity related adverse drug reactions (ADR) and AE potentially related to antibody-dependent enhancement of disease (ADE). Only Injection-related reactions including hypersensitivity and Injection site reactions through Day 29 were summarized.
Part 2: Number of Participants With Abnormal Clinically Significant ECG Findings Through Day 29	Up to Day 29	Twelve-lead ECG's were obtained in the semi-recumbent or supine position after 10 minutes of rest using an ECG machine. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. Data for the number of participants with abnormal clinically significant worst case post-Baseline ECG findings were reported.
Part 2: Number of Participants With Vital Signs Grade Shifts From Baseline Grade Through Day 29	Baseline (Day) and up to Day 29	Vital signs including SBP, DBP and pulse rate were measured in a semi-supine or sitting position after 5 minutes rest. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Worst-case post-Baseline shift data is presented.
Part 2: Number of Participants With Clinical Chemistry Grade Shifts From Baseline Grade Through Day 29	Baseline (Day 1) and up to Day 29	Blood samples were collected for analysis of clinical chemistry parameters including Alkaline Phosphatase (ALP), Total Bilirubin, Glucose, Potassium and Sodium. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome (AIDS) Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 2: Number of Participants With Any Increase in Worst-case Urinalysis Results Post-Baseline Relative to Baseline by Dipstick Method Through Day 29	Baseline (Day 1) and up to Day 29	Urine samples were collected for analysis of bilirubin, glucose, leukocyte esterase, occult blood and protein by a dipstick method. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Baseline is defined as the latest pre-dose assessment with a non-missing value on or after Day -1 visit, including those from unscheduled visits. Any increase means any increase to small, moderate, severe, potentially life threatening or positive post-Baseline relative to Baseline. Data is presented for only those parameters for which participants had any increase in urinalysis results post-Baseline relative to Baseline. Number of participants with worst case any increase in urinalysis results post-Baseline relative to Baseline has been presented.

Secondary Outcome Measures

Name	Time	Method
Part 1: Area Under the Curve From the Time of Dosing to the Time of the Last Measurable (Positive) Concentration (AUClast) of Sotrovimab Through Week 18	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Weeks 2, 3, 4, 6, 8, 12 and 18	The AUClast was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for AUClast and 90% Confidence Interval are presented.
Part 2: Cmax of Sotrovimab Through Week 18	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Weeks 2, 3, 4, 6, 8, 12 and 18	The Cmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for Cmax and 90% Confidence Interval are presented.
Part 2: AUC(0-infinity) of Sotrovimab Through Week 18	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Weeks 2, 3, 4, 6, 8, 12 and 18	The AUC0-infinity was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.
Part 2: AUClast of Sotrovimab Through Week 18	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Weeks 2, 3, 4, 6, 8, 12 and 18	The AUClast was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for AUClast and 90% Confidence Interval are presented.
Part 1: Time of the Last Quantifiable Concentration (Tlast) of Sotrovimab Through Week 18	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Weeks 2, 3, 4, 6, 8, 12 and 18	The Tlast was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 1: Terminal Elimination Half-life (t1/2) of Sotrovimab Through Week 18	Weeks 2, 3, 4, 6, 8, 12 and 18	The T1/2 was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 2: Tlast of Sotrovimab Through Week 18	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Weeks 2, 3, 4, 6, 8, 12 and 18	The Tlast was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 1: Cmax of Sotrovimab Through Week 18	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Weeks 2, 3, 4, 6, 8, 12 and 18	The Cmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented. An ethnicity comparison (Japanese versus Caucasian) was also conducted using ANCOVA adjusting for body weight. The geometric LS means ratio (Japanese versus Caucasian) for Cmax and 90% confidence interval are presented.
Part 1: Area Under the Serum Concentration-time Curve Extrapolated to Infinite Time (AUC[0-infinity]) of Sotrovimab Through Week 18	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Weeks 2, 3, 4, 6, 8, 12 and 18	The AUC(0-infinity) was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.
Part 1: Tmax of Sotrovimab Through Week 18	Day 1: Pre-dose, at end of infusion and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after end of infusion; Weeks 2, 3, 4, 6, 8, 12 and 18	The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 2: T1/2 of Sotrovimab Through Week 18	Weeks 2, 3, 4, 6, 8, 12 and 18	The T1/2 was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 2: Tmax of Sotrovimab Through Week 18	Day 1: Pre-dose and 1, 2, 6, 8, 24 (Day 2) and 48 (Day 3) hours after first IM injection; Weeks 2, 3, 4, 6, 8, 12 and 18	The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.
Part 1: Number of Participants With SAE and Common Non-SAE Through Week 18	Up to Week 18	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. 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 situations as per medical or scientific judgment. Adverse events which were not serious adverse events were considered as Non-Serious adverse events.
Part 1: Number of Participants With AESI Through Week 18	Up to Week 18	Adverse events of special interest (AESI) are relevant known toxicities of other therapeutic mAbs or signals observed in nonclinical programs of sotrovimab. AESI were defined as Infusion-related reactions (IRR) including hypersensitivity reactions, Hypersensitivity (SMQ narrow), Infusion site reactions, Immunogenicity related adverse drug reactions (ADR) and AE potentially related to antibody-dependent enhancement of disease (ADE).
Part 1: Number of Participants With Abnormal Clinically Significant ECG Findings Through Week 18	Up to Week 18	Twelve-lead ECG's were obtained in the semi-recumbent or supine position after 10 minutes of rest using an ECG machine. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. Data for the number of participants with abnormal clinically significant worst case post-Baseline ECG findings were reported.
Part 1: Number of Participants With Vital Signs Grade Shifts From Baseline Grade Through Week 18	Baseline (Day 1) and up to Week 18	Vital signs including SBP, DBP and pulse rate were measured in a semi-supine or sitting position after 5 minutes rest. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 1: Number of Participants With Clinical Chemistry Shifts From Baseline Grade Through Week 18	Baseline (Day 1) and up to Week 18	Blood samples were collected for analysis of clinical chemistry parameters including Aspartate Aminotransferase (AST), Total Bilirubin, Direct Bilirubin, Glucose (fasting), Glucose and Sodium. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome (AIDS) Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 1: Number of Participants With Any Increase in Worst-case Urinalysis Results Post-Baseline Relative to Baseline by Dipstick Method Through Week 18	Baseline (Day 1) and up to Week 18	Urine samples were collected for analysis of bilirubin, leukocyte esterase, occult blood and protein by a dipstick method. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Baseline is defined as the latest pre-dose assessment with a non-missing value on or after Day -1 visit, including those from unscheduled visits. Any increase means any increase to small, moderate, severe, potentially life threatening or positive post-Baseline relative to Baseline. Data is presented for only those parameters for which participants had any increase in urinalysis results post-Baseline relative to Baseline. Number of participants with worst case any increase in urinalysis results post-Baseline relative to Baseline has been presented.
Part 2: Number of Participants With SAE and Common Non-SAE Through Week 18	Up to Week 18	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. 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 situations as per medical or scientific judgment. Adverse events which were not serious adverse events were considered as Non-Serious adverse events.
Part 2: Number of Participants With AESI Through Week 18	Up to Week 18	Adverse events of special interest (AESI) are relevant known toxicities of other therapeutic mAbs or signals observed in nonclinical programs of sotrovimab. AESI were defined as Injection-related reactions including hypersensitivity reactions, Hypersensitivity (SMQ narrow), Injection site reactions, Immunogenicity related adverse drug reactions (ADR) and AE potentially related to antibody-dependent enhancement of disease (ADE).
Part 2: Number of Participants With Abnormal Clinically Significant ECG Findings Through Week 18	Up to Week 18	Twelve 12-lead ECG's were obtained in the semi-recumbent or supine position after 10 minutes of rest using an ECG machine. Clinically significant abnormal findings are those which are not associated with the underlying disease, unless judged by the investigator to be more severe than expected for the participant's condition. Data for the number of participants with abnormal clinically significant worst case post-Baseline ECG findings were reported.
Part 2: Number of Participants With Clinical Chemistry Grade Shifts From Baseline Grade Through Week 18	Baseline (Day 1) and up to Week 18	Blood samples were collected for analysis of clinical chemistry parameters including Alanine aminotransferase, Alkaline Phosphatase, Aspartate Aminotransferase, Total Bilirubin, Creatinine, Glucose (fasting), Glucose, Potassium and Sodium. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 2: Number of Participants With Vital Signs Grade Shifts From Baseline Grade Through Week 18	Baseline (Day 1) and up to Week 18	Vital signs including SBP, DBP and pulse rate were measured in a semi-supine or sitting position after 5 minutes rest. Baseline is latest pre-dose assessment with a non-missing value on or after Day -1 visit including those from unscheduled visits. Grade Shift from Baseline is defined as shift from any grade (at Baseline) to Grades 1, 2, 3 and 4 post-Baseline. A worst post-Baseline grade shift is defined as worst change that occurred at any measured time point during treatment period. Grading was determined by the Division of Acquired Immunodeficiency Syndrome Table for Grading Severity (DAIDS) version 2.1. Grade 0=Normal, Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe and Grade 4= Potentially Life-Threatening. Data is presented for only those parameters for which participants had grade shifts from Baseline grade. Worst-case post-Baseline shift data is presented.
Part 2: Number of Participants With Any Increase in Worst-case Urinalysis Results Post-Baseline Relative to Baseline by Dipstick Method Through Week 18	Baseline (Day 1) and up to Week 18	Urine samples were collected for analysis of bilirubin, glucose, leukocyte esterase, nitrite, occult blood, protein and urobilinogen by a dipstick method. The dipstick test gives results in a semi-quantitative manner indicating proportional concentrations in the urine sample. Baseline is defined as the latest pre-dose assessment with a non-missing value on or after Day -1 visit, including those from unscheduled visits. Any increase means any increase to small, moderate, severe, potentially life threatening or positive post-Baseline relative to Baseline. Data is presented for only those parameters for which participants had any increase in urinalysis results post-Baseline relative to Baseline. Number of participants with worst case any increase in urinalysis results post-Baseline relative to Baseline has been presented.