Medical News Today notes further progress towards the use of xenotransplantation to cure type 2 diabetes: "Unlike embryonic stem cells, which can become virtually any cell type, primordia are locked into becoming cells of a particular organ. Their approach for diabetes treatment uses pig pancreatic primordia. In previous research, they found that obtaining the primordia early in the pigs' development rendered them 'invisible' to the rats' immune system, eliminating the need for antirejection drugs. ... The transplanted primordia not only appropriately regulated blood sugar in the type 2 diabetic rats, they also reduced insulin resistance. The rats are cured by pig insulin, which comes from the transplants and can be measured in their circulation. The rats' own insulin-producing cells in the pancreas are atrophied." Remember that type 2 diabetes is a lifestyle disease: the majority of sufferers could have avoided it though better choices.