A British biotechnology company is claiming a breakthrough in the quest to create organs for transplant from pigs into humans.



PPL Therapeutics, based near Edinburgh in Scotland, says it has created the first so-called “double knock-out” pigs, genetically-engineered to lack both copies of a gene which causes rejection.



Scientists have given a mixed reaction to the claim.



Some experts say it represents a genuine advance, while others caution that it is one small step along a very long road.

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