What is blood?
Blood plays many vital roles. From protection against infections to the transport of oxygen and nutrients throughout our bodies, we can’t live without it. Most adults carry between 9 and 12 pints of blood.
Blood comes in four common "ABO types" – A, B, AB and O – with each of these also being either Rh-positive or Rh-negative. In addition to ABO/Rh, there are many other important substances on the surface of blood cells that sometimes require very precise matching between donor and patient – which is why we may sometimes focus on certain blood types to meet a patient’s special transfusion needs.
Some blood types are more common than others, but since blood cannot be manufactured, volunteer blood donors of all blood types are needed to donate regularly to help countless patients in need.
Learn about each blood type and if you're a BloodSource donor and don't know yours, login to MybloodSource to find out.