A Study to Learn About a Study Medicine Called Ibuzatrelvir in Adult and Adolescent Patients With COVID-19 Who Are Not Hospitalized But Are at Risk For Severe Disease — Stella
Phase 3 — Large-scale testing across thousands of people, comparing the new treatment against current standard treatments.
(237 sites) United States
Applied Research Center of Arkansas, Little Rock, Arkansas National Institute of Clinical Research - Bakersfield, Bakersfield, California 310 Clinical Research, Inglewood, California Long Beach Research Institute, Long Beach, California Long Beach Clinical Trials, Long Beach, California Pacific Clinical Studies Inc., Los Alamitos, California Downtown L.A. Research Center, Inc., Los Angeles, California Clinica mi Salud by Focil Med, Oxnard, California FOMAT Medical Research, Oxnard, California Paradigm Clinical Research, LLC, Redding, California Acclaim Clinical Research, San Diego, California Tweedy Medical Group - Charity Health, South Gate, California Breathe Clear Institute for Sinus and Allergy Relief, Torrance, California Paradigm Clinical Research, LLC, Wheat Ridge, Colorado Georgetown University Medical Center, Washington D.C., District of Columbia Emerson Clinical Research Institute, Washington D.C., District of Columbia Innovative Research of West Florida, Clearwater, Florida Invictus Clinical Research Group, Coconut Creek, Florida Hillcrest Medical Research LLC, DeLand, Florida Hillcrest Medical Research, DeLand, Florida Universal Axon Clinical Research, LLC, Doral, Florida Herco Medical and Research Center Inc, Flagami, Florida Proactive Clinical Research,LLC, Fort Lauderdale, Florida Qway Research LLC, Hialeah, Florida Sunbright Health Medical Centers, Homestead, Florida Bio-Medical Research LLC, Miami, Florida Kendall South Medical Center, Miami, Florida Nuovida Research Center, Miami, Florida Global Health Research Center, Inc., Miami Lakes, Florida Adult Medicine of Lake County, Inc., Mt. Dora, Florida Innovation Medical Research Center, Palmetto Bay, Florida DBC Research USA, Pembroke Pines, Florida GCP Research, Global Clinical professionals, St. Petersburg, Florida Global Health Research Center - Tampa, Tampa, Florida The Hope Clinic of Emory University, Decatur, Georgia Javara - Privia Medical Group Georgia - Fayetteville, Fayetteville, Georgia Coastal Heritage Clinical Research, Hinesville, Georgia Velocity Clinical Research, Savannah, Savannah, Georgia St. Luke's Humphreys Diabetes Center, Boise, Idaho St. Luke's Children's, Boise, Idaho St. Luke's Elks Children's Pavilion, Boise, Idaho Koch Family Medicine, Morton, Illinois UL International Travel Clinic, Louisville, Kentucky University of Louisville Hospital, Louisville, Kentucky University of Louisville School of Medicine, Louisville, Kentucky Centennial Medical Group, Columbia, Maryland Jadestone Clinical Research, Silver Spring, Maryland Brigham and Women's Hospital, Boston, Massachusetts University of Massachusetts Chan Medical School, Worcester, Massachusetts Revival Research Institute, LLC, Dearborn, Michigan Henry Ford St. John Hospital, Grosse Pointe Woods, Michigan Mercury Street Medical Group, PLLC, Butte, Montana Velocity Clinical Research, Grand Island, Grand Island, Nebraska McGill Family Practice, Papillion, Nebraska Las Vegas Clinical Trials, North Las Vegas, Nevada Upstate Global Health Institute, East Syracuse, New York Upstate Connect Care, Syracuse, New York Prime Global Research, The Bronx, New York Montefiore Medical Center, The Bronx, New York Monroe Biomedical Research, Monroe, North Carolina Remington-Davis, Inc, Columbus, Ohio Preferred Primary Care Physicians, Uniontown, Pennsylvania WR-Clinsearch, LLC, Chattanooga, Tennessee Zenos Clinical Research, Dallas, Texas Southwest Family Medicine Associates, Dallas, Texas Southwest Mind and Body Care, Dallas, Texas Memorial Hermann Hospital TMC, Houston, Texas The University of Texas Health Science Center at Houston, Houston, Texas UT Physicians, Houston, Texas Next Level Urgent Care, Houston, Texas Gulf Coast Clinical Research - Houston, Houston, Texas Mercury Clinical Research - Santa Clara Family Clinic, Houston, Texas The Crofoot Research Center, Houston, Texas Epic Clinical Research, Lewisville, Texas Javara - Privia Medical Group North Texas - Stephenville, Stephenville, Texas Javara - Privia Medical Group Gulf Coast - Sugarland, Sugar Land, Texas Mercury Clinical Research - North Houston Internal Medicine & Pediatric Clinic, Tomball, Texas Alpine Research Organization, Clinton, Utah Eastside Research Associates, Redmond, Washington Argentina
Sanatorio Guemes, Ciudad de Buenos Aires, Buenos Aires Hospital Italiano de La Plata, La Plata, Buenos Aires Centro de Investigaciones Médicas Mar del Plata, Mar del Plata, Buenos Aires Instituto Médico Río Cuarto, Río Cuarto, Córdoba Province Clínica Mayo de Urgencias Médicas Cruz Blanca S.R.L, San Miguel de Tucumán, Tucumán Province Equipo Ciencia, Buenos Aires Belgium
ANIMA Research, Alken, Limburg Brazil
Hospital Universitario Professor Edgard Santos, Salvador, Estado de Bahia Infection Control, Belo Horizonte, Minas Gerais School of Medicine Federal University of Minas Gerais, Belo Horizonte, Minas Gerais Complexo Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, Paraná Centro Médico São Francisco, Curitiba, Paraná Real Hospital Portugues, Recife, Pernambuco Instituto Atena de Pesquisa Clinica, Natal, Rio Grande do Norte Irmandade da Santa Casa de Misericórdia de Porto Alegre, Porto Alegre, Rio Grande do Sul Hospital São Lucas da PUCRS, Porto Alegre, Rio Grande do Sul Centro de Pesquisa Clínica - CPC/UFSM, Santa Maria, Rio Grande do Sul Hospital e Maternidade Celso Pierro, Campinas, São Paulo CECIP - Centro de Estudos do Interior Paulista, Jaú, São Paulo Bulgaria
Diagnostic Consultative Center - 1 - Sevlievo EOOD, Sevlievo, Gabrovo Medical Centre "Asklepiy", Dupnitsa, Kyustendil SHATPD Troyan, Troyan Municipality, Lovech Diagnostic Consultative Center - 1 Lom EOOD, Lom, Montana MHAT Samokov, Samokov, Sofia Military Medical Academy, Sofia, Sofia (stolitsa) Medical Center Pulmo - 2018 EOOD, Haskovo MHAT "Rahila Angelova" Pernik, Pernik Diagnostic Consultative Center "Sveti Georgi" Plovdiv, Plovdiv Medical Center Sveti Ivan Rilski Chudotvorets - 2010, Plovdiv Ambulatory for Individual Primary Medical Care - Dr. Pavlina Petrova - Poli ET, Sofia Medical Center Hera EOOD, Sofia Medical Center Diana Med 2001, Yambol Canada
Vancouver Infectious Diseases Centre, Vancouver, British Columbia Clinical Research of Ontario, Scarborough Village, Ontario Community Care Building, Winchester, Ontario Dundas Manor Nursing Home, Winchester, Ontario Winchester District Memorial Hospital, Winchester, Ontario Diex Recherche Quebec, Québec China
The People's Hospital of Chizhou, Chizhou, Anhui Peking University People's Hospital, Beijing, Beijing Municipality Zhongshan Hospital Fudan University (Xiamen Branch), Xiamen, Fujian Zhongshan Hospital Xiamen University, Xiamen, Fujian ZhuJiang Hospital of Southern Medical University, Guangzhou, Guangdong The Second Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi The Third Hospital of Changsha, Changsha, Hunan Jiangxi Provincial People's Hospital, Nanchang, Jiangxi The First Hospital of Jilin University, Changchun, Jilin Huashan Hospital, Fudan University, Shanghai, Shanghai Municipality Shanghai Children's Medical Center, Shanghai, Shanghai Municipality Shanghai Minhang District Central Hospital, Shanghai, Shanghai Municipality Czechia
Doktor Brno, Brno, Brno-město Praktický lékař Hořiněves, Hořiněves, Hradec Králové Region Lékařský dům v Mezibranské, Prague, Praha 1 Ordinace Hradebni s.r.o., České Budějovice, South Bohemian Region Zdravi-fit, Protivín, South Bohemian Region MUDr. Petra První s.r.o., Radomyšl, South Bohemian Region ORL MUDr Pavel Navratil, Olomouc Denmark
Rigshospitalet, Copenhagen, Capital Region Nordsjællands Hospital - Hillerød, Hilleroed, Capital Region Regionshospitalet Gødstrup, Herning, Central Jutland Aalborg Universitetshospital, Syd, Aalborg, North Denmark Roskilde Sygehus, Roskilde, Region Sjælland Finland
FVR, Oulun rokotetutkimusklinikka, Oulu, North Ostrobothnia FVR, Tampereen rokotetutkimusklinikka, Tampere, Pirkanmaa FVR, Etelä-Helsingin rokotetutkimusklinikka, Helsinki, Uusimaa MeVac - Meilahti Vaccine Research Center, Helsinki, Uusimaa Germany
LMU Klinikum München, Munich, Bavaria Praxisgemeinschaft Heimeranplatz, Munich, Bavaria IKF Pneumologie Frankfurt, Clinical Research Center, Departments: Pulmonology, Endocrinology, Cardio, Frankfurt am Main, Hesse Studien Rahman & Detho, Obertshausen, Hesse Praxis am Ebertplatz, Cologne, North Rhine-Westphalia Novopraxis Berlin GbR, Berlin zibp Zentrum für lnfektiologie Berlin Prenzlauer Berg GmbH, Berlin Charité - Universitätsmedizin Berlin, Berlin Universitätsklinik Freiburg, Freiburg im Breisgau Japan
Kamezawa Clinic, Kasugai, Aichi-ken International University of Health and Welfare Narita Hospital, Narita, Chiba Tashiro Endocrinology Clinic, Fukuoka, Fukuoka Medical Corporation Kouhoukai Takagi Hospital, Okawa-shi, Fukuoka Nishioka Hospital, Sapporo, Hokkaido Terada Clinic Respiratory Medicine & General Practice, Himeji, Hyōgo Koga General Hospital, Koga-shi, Ibaraki Tsuchiura Beryl Clinic, Tsuchiura, Ibaraki Shonan Fujisawa Tokushukai Hospital, Fujisawa, Kanagawa Shonan Kamakura General Hospital, Kamakura, Kanagawa Rakuwakai Otowa Hospital, Kyoto, Kyoto National Hospital Organization Okinawa Hospital, Ginowan, Okinawa Fukuwa Clinic, Chuo-ku, Tokyo
Mexico
Asociación Mexicana para la Investigación Clínica A.C., Pachuca, Hidalgo JM Research SC, Cuernavaca, Morelos Arké SMO S.A de C.V, Veracruz Slovakia
IRS - Medicinska cinnost s.r.o., Vseobecna ambulancia pre dospelych, Kosice-Juh, Košice Region Artromac n.o., Košice, Košice Region ML MED, s.r.o., Vseobecna ambulancia pre dospelych, Moldava nad Bodvou, Košice Region Plucna ambulancia Hrebenar, s.r.o., Pneumologicko-ftizeologicka ambulancia, Spišská Nová Ves, Košice Region PULMO, s.r.o., Pneumologicko-ftizeologicka ambulancia, Prešov, Presov SALUBER SK s.r.o., Vseobecna ambulancia pre dospelych, Nové Mesto nad Váhom, Trenčín Region MUDr. Viliam Cibik, PhD., s.r.o., Pruské, Trenčín Region AMB4YOU s.r.o., Hlohovec, Trnava Region VL.AK s.r.o. Vseobecna ambulancia pre dospelych, Trnava, Trnava Region South Africa
Newtown Clinical Research, Johannesburg, Gauteng Global Clinical Trials, Pretoria, Gauteng Jongaie Research, Pretoria West, Gauteng Sandton Medical Research Centre, Sandton, Gauteng Dr P J Sebastian Clinical Research Centre, Chatsworth, KwaZulu-Natal Synapta Clinical Research Centre, Durban, KwaZulu-Natal TREAD Research, Cape Town, Western Cape Langeberg Clinical Trials, Cape Town, Western Cape Paarl Research Centre, Paarl, Western Cape South Korea
Incheon Medical Center, Donggu, Incheon-gwangyeoksi [incheon] Gachon University Gil Medical Center, Namdong-gu, Incheon-gwangyeoksi [incheon] Wonju Severance Christian Hospital, Wŏnju, Kang-won-do Chonnam National University Hospital, Gwangju, Kwangju-kwangyǒkshi Korea University Ansan Hospital, Ansan-si, Kyǒnggi-do Ajou University Hospital, Suwon, Kyǒnggi-do Chung-Ang University Hospital, Dongjak-gu, Seoul-teukbyeolsi [seoul] Gangnam Severance Hospital, Yonsei University Health System, Gangnam-gu, Seoul-teukbyeolsi [seoul] Korea University Anam Hospital, Seoul, Seoul-teukbyeolsi [seoul] The Catholic University of Korea, Eunpyeong St. Mary's Hospital, Seoul, Seoul-teukbyeolsi [seoul] Hallym University Kangnam Sacred Heart Hospital, Seoul, Seoul-teukbyeolsi [seoul] Korea University Guro Hospital, Seoul, Seoul-teukbyeolsi [seoul]
Spain
CHUAC-Complejo Hospitalario Universitario A Coruña, A Coruña, A Coruña [LA Coruña] Hospital Vithas Xanit Internacional, Benalmádena, Andalusia Hospital Universitario Reina Sofia, Córdoba, Andalusia Hospital Germans Trias i Pujol, Badalona, Barcelona [barcelona] Hospital Universitari Vall d'Hebron, Barcelona, Barcelona [barcelona] Hospital Universitario La Paz, Madrid, Madrid, Comunidad de CHUVI- Hospital Alvaro Cunqueiro, Vigo, Pontevedra [pontevedra] Hospital General Universitario Dr. Balmis, Alicante Hospital Universitario Infanta Leonor, Madrid Hospital Universitario Virgen de Valme, Seville Taiwan
Far Eastern Memorial Hospital, New Taipei City, NEW Taipei Taichung Veterans General Hospital, Taichung Taipei Veterans General Hospital, Taipei Tri-Service General Hospital, Taipei Chang Gung Medical Foundation-Linkou Branch, Taoyuan District Turkey (Türkiye)
Acibadem Universitesi Atakent Hastanesi, Istanbul, İ̇stanbul Ankara University Ibni Sina Hospital, Ankara Hacettepe Universite Hastaneleri, Ankara Ankara Bilkent Şehir Hastanesi, Ankara Gaziantep Universitesi Sahinbey Arastirma ve Uygulama Hastanesi, Gaziantep Kocaeli Üniversitesi, Kocaeli Sakarya Training and Research Hospital, Sakarya Karadeniz Technical University, Trabzon
Key details Enrollment target
~2,330 participants
Primary completion
October 2027
Age range
12 Years and older
Last updated April 2026
Interested in joining? Faculdade de Medicina do ABC, Santo André, São Paulo
Centro de Referência e Treinamento DST/AIDS, São Paulo, São Paulo Instituto Nacional de Infectologia Evandro Chagas, Rio de Janeiro Instituto de Infectologia Emilio Ribas, São Paulo First Affiliated Hospital of Shanxi Medical University, Taiyuan, Shanxi
Tianjin First Central Hospital, Tianjin, Tianjin Municipality The First People's Hospital of Yunnan Province, Kunming, Yunnan Sir Run Run Shaw Hospital Zhejiang University School of Medicine, Hangzhou, Zhejiang Beijing Ditan Hospital Capital Medical, Beijing Musashino Emergency Hospital, Kodaira-shi, Tokyo
Swing Nozaki Clinic, Musashino-shi, Tokyo Yoshijima Hospital, Hiroshima Keimyung University Dongsan Hospital, Daegu, Taegu-kwangyǒkshi