COVID-19 Study Assessing the Efficacy and Safety of Anti-Spike SARS CoV-2 Monoclonal Antibodies for Prevention of SARS CoV-2 Infection Asymptomatic in Healthy Adults and Adolescents Who Are Household Contacts to an Individual With a Positive SARS-CoV-2 RT-PCR Assay

Key Inclusion Criteria:

   1. Adult subjects 18 years of age (irrespective of weight) and above at the signing of
   informed consent or adolescent participants ≥12 to <18 years of age, or pediatric
   participants <12 years of age at the signing of the assent (parent/guardian sign the
   informed consent)

   2. Asymptomatic household contact with exposure to an individual with a diagnosis of
   SARS-CoV-2 infection (index case). To be included in the study, participants must be
   randomized within 96 hours of collection of the index cases' positive SARS-COV-2
   diagnostic test sample

   3. Participant anticipates living in the same household with the index case until study
   day 29

   4. Is judged by the investigator to be in good health based on medical history and
   physical examination at screening/baseline, including participants who are healthy or
   have a chronic, stable medical condition

   5. Willing and able to comply with study visits and study-related procedures/assessments.

   6. Provide informed consent signed by study participant or legally acceptable
   representative.

Key Exclusion Criteria:

   1. History of prior positive SARS-CoV-2 RT-PCR test or positive SARS-CoV-2 serology test
   at any time before the screening

   2. Participant has lived with individuals who have had previous SARS-CoV-2 infection or
   currently lives with individuals who have SARS-CoV-2 infection, with the exception of
   the index case(s), the first individual(s) known to be infected in the household

   3. Active respiratory or non-respiratory symptoms consistent with COVID-19

   4. History of respiratory illness with sign/symptoms of SARS-CoV-2 infection, in the
   opinion of the investigator, within the prior 6 months to screening

   5. Nursing home resident

   6. Any physical examination findings, and/or history of any illness, concomitant
   medications or recent live vaccines that, in the opinion of the study investigator,
   might confound the results of the study or pose an additional risk to the participant
   by their participation in the study

Note: Other protocol-defined Inclusion/ Exclusion criteria apply