The Lancet: First report of long-term safety of human embryonic stem cells to treat human disease

New research published in The Lancet provides the first evidence of the medium-term to long-term safety and tolerability of transplanting human embryonic stem cells in humans. hESC transplants used to treat severe vision loss in 18 patients with different forms of macular degeneration appeared safe up to 3 years post-transplant, and the technology restored some sight in more than half of the patients.

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