LY3819253

The endpoint for the primary analysis is defined as the first occurrence of coronavirus disease - 2019 (COVID-19), defined as the detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by reverse transcription - polymerase chain reaction (RT-PCR) AND mild or worse disease severity within 21 days of detection, by Day 57 (8 weeks after randomization). The participant needed to test positive on or prior to week 8, and they needed to develop their symptoms on or after their positive test date, but no later than 21 days after their positive swab OR Week 8, whichever comes first. Logistic regression model was used which includes occurrence of a primary endpoint event as the response variable, and treatment and stratification factors such as facility as explanatory variables.

Percentage of Participants who Experience COVID-19 Related Hospitalization or Death From Any Cause. Hospitalization is defined as ≥24 hours of acute care.

Percentage of participants with SARS-CoV-2 viral load greater than 5.27 on Day 7. Missing data is estimated using Relevance Sequence Imputation (RSI). RSI is defined as follows: If Day 7 SARS-CoV-2 viral load is missing, then Day 7 will be imputed using data from the first available for Day 5, Day 3, Day 11, or Day 1.

Percentage of participants with SARS-CoV-2 viral load greater than 5.27 on Day 7. Missing data is estimated using Last Observation Carried Forward (LOCF).

Percentage of participants with SARS-CoV-2 viral load greater than 5.27 on Day 7. Missing data is estimated using Last Observation Carried Forward (LOCF).

COVID-19 Related Deterioration (yes/no) was defined as a participant experiencing COVID-19-related hospitalization (defined as 24 hours of acute care) or death from any cause by Day 29.

SARS-CoV-2 persistent high viral load (yes/no) was defined as ribonuclease P(RP) normalized viral load \>=5.27 vs otherwise.

SARS-CoV-2 viral load was based on nasopharyngeal swab sampling for reverse transcription polymerase chain reaction (RT-PCR) testing for SARS-CoV-2. Least squares (LS) mean values were determined using a mixed-effects model repeated-measures (MMRM) that included log base 10 transformed baseline as a covariate, treatment, day, treatment-by-day interaction as fixed effects. If Day 11 SARS-CoV-2 viral load was missing, the earliest measurement closest to the Day 11 visit, but within 4 days (Day 7-Day 15), was used for the Day 11 value. If no measurements were available, the Day 11 viral load was treated as missing at random (MAR) in the analysis. Viral load is reported as normalized viral load and is unitless.

An SAE was defined as any untoward medical occurrence that, at any dose: results in death, is life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, results in persistent disability/incapacity, is a congenital anomaly/birth defect and other different situations will have medical or scientific judgment to determine if they are SAE. A summary of SAEs and other non-serious adverse events (AEs), regardless of causality are reported in the Adverse Events section.

Mean Concentration of Bamlanivimab in the presence of Etesevimab is reported. Due to the limited number of pediatric participants across all study arms in phase 3, PK concentration summary data was combined including phase 3 and phase 2/3 (Pediatric addendum, Arm 22) reporting arms. All pediatric participants from Phase 3 trial arms including Arm 22 who contributed data to the required outcome (PK concentration at Day 29) were included in the PK summary.

Mean Concentration of Etesevimab in the presence of Bamlanivimab is reported. Due to the limited number of pediatric participants across all study arms in phase 3, PK concentration summary data was combined including phase 3 and phase 2/3 (Pediatric addendum, Arm 22) reporting arms. All pediatric participants from Phase 3 trial arms including Arm 22 who contributed data to the required outcome (PK concentration at Day 29) were included in the PK summary.

AUC0-∞ for Bebtelovimab was reported.

An SAE is any adverse event that results in death, persistent or significant disability/incapacity, or drug dependency/abuse; is life-threatening, an important medical event, or a congenital anomaly/birth defect; or requires or prolongs hospitalization. The number of participants with 1 or more SAEs considered by the investigator to be related to study drug administration is reported. A summary of SAEs and other non-serious adverse events (AEs), regardless of causality, were reported in the Reported Adverse Events module.