Hallie

Hallie Campbell, who was born with a rare genetic condition called AADC deficiency, had experimental gene therapy in Poland in 2019, and is now learning to walk

Last year we followed the story of little Hallie Campbell, the 7-year-old from Wigan who went to Poland for pioneering brain surgery. It was all made possible thanks in big part to the generosity of the Granada reports viewers who helped raise £70,000.

The family of 6-year-old Hallie Campbell fly to Poland for life-changing surgery. We've been given exclusive access to follow operation.