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One of the possible future treatments for type 1 diabetes is gene therapy. Researchers have identified a faulty gene which makes people with the gene more likely to develop type 1 diabetes. In the future, this gene could be replaced by a fully-working version of the gene. This could prevent people from getting diabetes.
In theory, gene therapy could even be used on embryos before they were implanted into the womb during in vitro fertilisation treatment.
Is this a step too far for science or a great leap forward for medicine?