RecruitingPhase 3Drug trialA Study of Secutrelvir in Participants With Coronavirus Disease 2019 (COVID-19) Who Are at High Risk for Progression to Severe DiseaseThe primary purpose of this study is to evaluate the efficacy and safety of secutrelvir in symptomatic nonhospitalized adult and adolescent participants with COVID-19 who are at high risk for progression to severe disease.