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

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

key inclusion criteria: 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) 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 participant anticipates living in the same household with the index case until study day 29 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 willing and able to comply with study visits and study-related procedures/assessments. provide informed consent signed by study participant or legally acceptable representative. key

key inclusion criteria: 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) 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 participant anticipates living in the same household with the index case until study day 29 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 willing and able to comply with study visits and study-related procedures/assessments. provide informed consent signed by study participant or legally acceptable representative. key

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

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

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 (weight ≥40 kg) at the signing of the assent (parents 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

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 (weight ≥40 kg) at the signing of the assent (parents 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

key inclusion criteria: 1. 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 2. participant anticipates living in the same household with the index case until study day 29 3. 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 4. willing and able to comply with study visits and study-related procedures/assessments. 5. provide informed consent signed by study participant or legally acceptable representative. key

key inclusion criteria: 1. 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 2. participant anticipates living in the same household with the index case until study day 29 3. 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 4. willing and able to comply with study visits and study-related procedures/assessments. 5. provide informed consent signed by study participant or legally acceptable representative. key