Rilematovir is an investigational RSV specific fusion inhibitor currently in development for the treatment of RSV infection in both adult and pediatric populations. The study will include a Screening period (Day -1 to Day 1), a Treatment period (Day 1 to Day 7/8 \[depending on timing of first dose\]), and a Follow-up period (Day 8/9 to Day 35). The total study duration of the study for each participant will be up to 35 days. The study will evaluate efficacy and safety of RSV in adult outpatients (18-85 years) who are at high risk of RSV related disease progression and have at least moderate RSV disease. The efficacy assessments include evaluation with electronic patient-reported outcome (ePRO) and the safety assessments include evaluations of physical examinations, vital signs, electrocardiograms, clinical laboratory tests, and adverse events.
