Video Report by Rob Smith
A young bride-to-be from Liverpool is alive to plan her big day, thanks to a remarkable genetic treatment for leukaemia.
Sophie Mulligan, who's 24, knew she'd exhausted every main treatment for the disease after being diagnosed in 2015.
But Sophie's time wasn't up. Doctors offered a rare treatment called CAR-T to train her immune system to fight leukaemia by itself. A lab in the United States took a sample of her blood and extracted disease-fighting cells. Scientists genetically reprogrammed those to find and destroy the cancer.
And, unbelievably, they did it at the peak of the pandemic.