inclusion criteria: age between 18 and 65 years, inclusive. body weight >45 kg. body mass index >18.5. close contact with a person who has a pcr-confirmed sars-cov-2 infection within 5 days before screening. only one member in the same household will be enrolled. participants must be able to give informed consent and comply with the study's scheduled events/visits and study assessments. sars-cov-2 positive index case must be able to give consent to enable collection of the documented positive pcr test. female participants of childbearing potential must use a highly effective method of contraception for the duration of the trial.

inclusion criteria: age between 18 and 65 years, inclusive. body weight >45 kg. body mass index >18.5. close contact with a person who has a pcr-confirmed sars-cov-2 infection within 5 days before screening. only one member in the same household will be enrolled. participants must be able to give informed consent and comply with the study's scheduled events/visits and study assessments. sars-cov-2 positive index case must be able to give consent to enable collection of the documented positive pcr test. female participants of childbearing potential must use a highly effective method of contraception for the duration of the trial.