Jesse Gelsinger

New Capabilities

Died September 17, 1999, four days after receiving experimental gene therapy

Gene therapy killed Jesse Gelsinger in 1999. His death triggered FDA shutdowns, lawsuits, and nearly ended the field. Fast forward to December 2025: British scientists published results showing that base-edited immune cells—a 'living drug'—achieved deep remissions in 82% of children with previously incurable T-cell leukemia. Three years after treatment, 64% remain disease-free. Some patients are off treatment entirely.

Updated Jan 9