Exposure to any germs could’ve killed her. 11 years later, she’s living a normal life thanks to a gene therapy treatment.

October 16, 2025

3D rendering of a DNA molecule

(NBC News) – New research found that gene therapy for children with a form of severe combined immunodeficiency was successful in 95% of trial participants.

Scientists have identified about 20 gene variants that cause SCID. Eliana’s form of the disease, ADA-SCID, is diagnosed in fewer than 10 children born in the U.S. each year. (Under 100 babies are diagnosed with any form of SCID in a given year.)

In 2014, when she was just 10 months old, Eliana was one of 62 children enrolled in a clinical trial for a gene therapy for ADA-SCID. In a study published Wednesday in the New England Journal of Medicine, researchers followed up on the results of that Phase 2 clinical trial. The update reported that all 62 kids, who received the treatment from 2012 to 2019, are alive today. In 59 of them, including Eliana, the gene therapy completely restored immune function, without requiring any additional treatment — a success rate of 95%. (Read More)