I'm sure you've seen, fairly recently, a lot of advertisements calling for blood donation. Particularly in the U.K where the NHS pleads for blood donation so that hospitals and ambulances have enough blood in their blood bank to be able to provide it to patients during emergencies. However sometimes donations aren't enough, and science needs to find another solution, albeit temporary, to provide "man-made" blood for use in emergency blood transfusions. The need increases especially when stored blood is unavailable or undesirable. Undesirable being defined as the blood type of the donor blood is not compatible with the patient's blood type or there isn’t enough blood ready for transfusion with the patient’s blood type. Artificial Oxygen Carrier Dr. Doctor and his colleges and his team have developed ErythroMer which is a new artificial blood substitute which is currently under trials, testing its efficacy before its official use in health