A Clinical Study for Infants and Toddlers Diagnosed with Respiratory Syncytial Virus (RSV)

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Open to people ages up to 36 months

• Male or female who is either: born ≥37 weeks of gestation and is age ≥28 days to ≤36 months, defined at the time of randomization, or born <37 weeks of gestation and is age ≥6 months to ≤36 months defined at the time of randomization
• Subjects diagnosed with RSV infection
• Subjects with signs of an acute respiratory illness with onset ≤7 days before the time of signing the ICF
• In the Investigator's opinion, the subject's caregiver understands and is able to comply with protocol requirements, instructions, and protocol-stated restrictions, and the subject is likely to complete the study as planned

• Use of or anticipated need for intensive monitoring and associated medical care
• Underlying immune deficiency, eg, from confirmed human immunodeficiency virus infection or use of an immunosuppressive medication except immunoglobulin A deficiency
• Receipt of (within 12 months before Screening) or on a waiting list for a bone marrow, stem cell, or solid organ transplant, or who received radiation or chemotherapy (within 12 months before screening)
• Receiving chronic oxygen therapy at home before admission
• Receiving an investigational or approved medication that is intended to prevent or treat RSV infection within 30 days or 5 half-lives (whichever is longer) before the first dose of study drug, and/or is currently enrolled in a clinical trial of such a medication