Liver transplant surgery Demi Leigh-Brennan is a true miracle, because she is believed to be the first person in the world to have had her blood type switched after a liver transplant. A virus had completely destroyed her liver, so doctors transplanted a donor one. It wasn't the first surgery the doctors had done, so there wasn't much of note here, but the result was staggering for everyone. Demi was Rh-negative from birth, and after the surgery, she was Rh-negative, just like the liver donor.