Ewelina Mamcarz, St. Jude Children's Research Hospital (image) St. Jude Children's Research Hospital Share Print E-Mail Caption Ewelina Mamcarz, M.D., presents research at the 2017 ASH conference that indicates that the St. Jude XSCID gene therapy has been well tolerated and effective for infants as young as 2 months old. Credit Peter Barta / St. Jude Children's Research Hospital. Usage Restrictions None Share Print E-Mail 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.