They use blood to clean out waste ##s and extra water . More than 15 million Americans have some degree of kidney failure . Many sounded genuinely interested in helping , but others sought to sell a kidney , which is illegal in the United States . About three - quarters of kidney transplants are between family members .
They use blood to clean out waste ##s and extra water . More than 15 million Americans have some degree of kidney failure . About three - quarters of kidney transplants are between family members .