Blood transfusions are often lifesaving when patients desperately need to replace blood lost due to surgery or injury. The problem is that blood is in low supply worldwide. To make matters worse, there are multiple blood groups, some of which are incompatible. For instance, if your blood type is O negative, you can only receive O-negative-type blood. O negative is the universal donor type, compatible with any blood type since it lacks certain antigens on the surface of its blood cells. However, only 8% of people have O-negative blood. Furthermore, in addition to the major blood types, there ar…