Example of Gene Therapy Development (IMAGE) St. Jude Children's Research Hospital Caption St. Jude gene therapy is modeled on the human immunodeficiency virus, a lentivirus that can infect cells that are not dividing. Researchers have re-engineered the lentivirus to ferry a normal copy of IL2RG into patients' blood stem cells and to be self-inactivating. Credit St. Jude Children's Research Hospital / Seth Dixon Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.