Those with O positive blood can only receive transfusions from O positive or O negative blood types.Type O positive blood is critical in trauma care. The risk of reaction is much lower in ongoing blood loss situations and O positive is more available than O negative. In major traumas with massive blood loss, many hospitals transfuse O positive blood, even when the patient’s blood type is unknown.Learn more about how you can be a Hero for a Baby. O positive donors who are CMV negative are known as Heroes for Babies at the Red Cross because it is the safest blood for transfusions for immune deficient newborns. ![]() That’s another reason it’s in such high demand.
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