BBC Breakfast presenters Sally Nugent and Jon Kay welcomed Alyssa Tapley to the studio

BBC Breakfast viewers were left moved on Tuesday morning as Sally Nugent and Jon Kay interviewed a remarkable young woman who has beaten what was thought to be an incurable cancer diagnosis.

Introducing Alyssa Tapley, Jon explained: "Now we've got a remarkable health story for you. This morning, a 16-year-old girl became the first patient in the world to be given a brand new treatment for a previously incurable blood cancer."

Sally added: "Yes, Alyssa Tapley had gene therapy three years ago at Great Ormond Street Hospital and University College London. She is now cancer-free. Alyssa is going to join us in just a moment, but first, here's our medical editor, Fergus Walsh."

In footage shown befor

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