Viral specific T cells (VSTs), posoleucel (ALVR105), to prevent viral infections after an allogeneic (cells from a donor) blood or marrow transplant (BMT) in children and adults


1 and older

Phase 2, Phase 3

39 Locations


Clinical Trial Goal

To find out if posoleucel is safe and works well to prevent viral infections after allogeneic BMT in children and adults

You may be able to join this trial if you:

  • Are 1 year old or older
  • Have an infection with one of the following:
    • Adenovirus (AdV)
    • BK virus (BKV)
    • Cytomegalovirus (CMV)
    • Epstein-Barr virus (EBV)
    • Human herpes virus-6 (HHV-6)
    • JC virus (JCV)
  • Had an allogeneic BMT in the last 6 weeks
  • Have a posoleucel product that is a match to you. Your doctor and the clinical trial doctors can tell you this
  • Do not have graft-versus-host disease (GVHD) that doctors consider grade 2 or higher
  • Are not being treated with high-dose steroids. Your doctor can tell you this
  • Agree to have other standard tests done to see if you can be in the clinical trial 

Trial Details

Posoleucel is made from VSTs. VSTs are a type of immune cell that know how to find and destroy viruses. In this trial, VSTs are previously collected from donors.

Everyone in the trial will get standard treatment if they develop an infection.

In this trial, you’ll be randomized to 1 of 2 groups. Once you’re randomized, you and the clinical trial doctors won’t know which group you’re in until after the trial is finished:
Group 1 – Posoleucel
Group 2 Placebo  

Randomized means doctors will use a computer to assign you to either group. A computer assigns you by chance, like flipping a coin or drawing a name out of a hat. You, your doctor or the clinical trial doctor won’t have any control over which group you’ll be assigned. This means you won’t be able to choose your group.  

You'll get:
  • Posoleucel – (Group 1 only) – Given as an intravenous (IV) infusion 7 times in 3 months
  • Placebo – (Group 2 only) – Given as an IV infusion with no medicine in it 7 times in 3 months

The clinical trial doctors will check your health for about 6 months.   

The Food and Drug Administration (FDA) not yet approved posoleucel. 


Dee Rodriguez, 833-409-2281,


University of Alabama at BirminghamRecruiting

Birmingham, Alabama

Honor HealthNot yet recruiting

Scottsdale, Arizona

UCLANot yet recruiting

Los Angeles, California

City of HopeRecruiting

Duarte, California

Stanford UniversityRecruiting

Palo Alto, California

University of California, San Francisco Medical CenterRecruiting

San Francisco, California

University of Colorado HospitalRecruiting

Aurora, Colorado

Yale University School of MedicineRecruiting

New Haven, Connecticut

Childrens National Health SystemRecruiting

Washington, District of Columbia

Children's National Medical CenterRecruiting

Washington, District of Columbia


Tampa, Florida

University of Florida - Division of Hematology & OncologyRecruiting

Gainesville, Florida

Northside HospitalRecruiting

Atlanta, Georgia

Loyola UniversityNot yet recruiting

Maywood, Illinois

University of ChicagoNot yet recruiting

Chicago, Illinois

Indiana University HospitalRecruiting

Indianapolis, Indiana

University of Kansas Cancer CenterRecruiting

Kansas City, Kansas

University of Maryland Medical CenterRecruiting

Baltimore, Maryland

Dana Farber Cancer InstituteRecruiting

Boston, Massachusetts

University of MinnesotaRecruiting

Minneapolis, Minnesota

Washington University School of MedicineNot yet recruiting

Saint Louis, Missouri

Barns Jewish HospitalRecruiting

Saint Louis, Missouri

Children's Mercy Hospital - Kansas CityRecruiting

Kansas City, Missouri

Hackensack University Medical CenterRecruiting

Hackensack, New Jersey

Columbia UniversityRecruiting

New York, New York

Roswell Park Comprehensive Cancer CenterRecruiting

Buffalo, New York

Stony Brook University Hospital Cancer CenterRecruiting

Stony Brook, New York

Weil Medical College - NY Presbyterian HospitalRecruiting

New York, New York

Levine Cancer CenterRecruiting

Charlotte, North Carolina

Nationwide Children's HospitalRecruiting

Columbus, Ohio

Oregon Health & Science UniversityRecruiting

Portland, Oregon

University of PennsylvaniaRecruiting

Philadelphia, Pennsylvania

Vanderbilt University Medical CenterNot yet recruiting

Nashville, Tennessee

Children's Medical Center DallasRecruiting

Dallas, Texas

University Utah Childrens HospitalNot yet recruiting

Salt Lake City, Utah

Virginia Commonwealth UniversityNot yet recruiting

Richmond, Virginia

University of VirginiaRecruiting

Charlottesville, Virginia

Fred Hutchinson Cancer Research CenterRecruiting

Seattle, Washington

Froedtert Hospital and the Medical College of WisconsinRecruiting

Milwaukee, Wisconsin record

NCT05305040. First posted on 3/31/22

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