The cutting-edge cellular therapies aiming to ease America's organ shortage

Despite being the wealthiest nation on the face of the planet, the United States chronically runs short of transplantable organs. Kidneys are far and away the most sought-after organ for transplantation, followed by livers. While the liver is the only human organ known capable of regenerating itself, if you damage yours badly enough for long enough — as some 30 million Americans have — then the only treatment is a transplant. Assuming you can even acquire one for doctors to stick in you. Every year demand for replacement livers outstrips supply by a scope of tens of thousands.