Many countries lack blood donors. The quest to create an artificial, lab-made blood type that could make up for supply shortages is extremely difficult. But there are some technologies that offer hope ...

Scientists have transfused lab-made red blood cells into a human volunteer in a world-first trial that experts say has major potential for people with hard-to-match blood types or conditions such as ...

Our bodies make blood in a specialized niche—a "nursery" within our bone marrow that nurtures blood stem cells so they can replicate and make different kinds of blood cells. The lab of Leonard Zon, MD ...