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. A 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.

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. AESIs were infusion-related reactions (IRR) including hypersensitivity, events related to antibody-dependent enhancement, and events related to immunogenicity.

Twelve-lead ECGs were recorded with the participant in a semi-supine position after being at rest for at least 10 minutes using an ECG machine. Clinically significant abnormal findings were determined as per clinical judgement by the investigator. Number of participants with worst-case clinically significant and not clinically significant abnormal ECG findings have been presented.

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, and considered to be not causally-related to the study agent or study procedures by the Investigator, were reported as a Disease-Related Events (DRE).

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 (NP) swab samples. Analysis was performed using an Analysis of covariance (ANCOVA) model with covariates of treatment and Baseline logarithm (base 10) viral load.

AUC of SARS-CoV-2 viral load was measured by qRT-PCR from Day 1 to Day 8 in NP swab samples. Analysis was performed using an ANCOVA model with covariates of treatment, and Baseline logarithm (base10) viral load and randomization stratification factor (prior exposure to an authorized or approved SARS-CoV-2 vaccine).

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.

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.

The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.

The CD29 was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.

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.

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.

The Tmax was summarized using standard non-compartmental pharmacokinetic analysis methods. The median and full range are presented.

The CD29 was summarized using standard non-compartmental pharmacokinetic analysis methods. The geometric mean and geometric coefficient of variation are presented.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.