Transplant girl's amazing miracle

Doctors say a 14-year-old Australian girl who had a liver transplant is a one-in-six-billion miracle.

Demi-Lee Brennan was given a new liver six years ago, and she expected to be on powerful drugs for the rest of her life to help her body accept it.

But doctors were amazed when Demi-Lee's immune system - the defences in your body that keep you healthy - took on her transplant donor's immune system.

The type of her blood has changed too, so she no longer needs medication.

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Demi-Lee had the liver transplant when she was nine-years-old, and doctors first noticed something unusual when afterwards, some of her tests came back with very strange results.

Doctor Stephen Alexander said: "We didn't believe it, we thought this was just too strange an occurrence to occur."

But the doctors can't explain how Demi-Lee's amazing recovery happened.

"We don't have a good answer why it did occur, we're just amazingly glad that it did," Dr Alexander added.