Scientists have found to produce blood. The blood is enough to give to . The old of making blood was very slow and . It was difficult to make a . The new way means can make a lot. They can make as as they want. They can make "unlimited" of blood.
A researcher said his needs the to mass produce blood. He said it was a . He said his team would make rare types of blood at . These are easy to find. Not people with blood types donate blood. He said: "Suitable… blood cell can be difficult to [find]."
