فعلا كان فى الماضى يظن البعض بان فصيلة O معطى عام ولكن لتقدم الاجهزة وجد انها يجب ان تعطيها لنغس الفصيلة وكثير من الاطباء لايعرفو هذة الحقيقة
In the past, a person with blood type O negative blood was considered to be a universal donor. It meant his or her blood could be given to anyone, regardless of blood type, without causing a transfusion reaction. This is no longer a relevant concept because of a better understanding of the complex issues of immune reactions related to incompatible donor blood cells."
- Mayo Clinic HealthOasis - Ask a Physician 08/09/2000 [view full text HERE]
In the past, a person with blood type O negative blood was considered to be a universal donor. It meant his or her blood could be given to anyone, regardless of blood type, without causing a transfusion reaction. This is no longer a relevant concept because of a better understanding of the complex issues of immune reactions related to incompatible donor blood cells."
- Mayo Clinic HealthOasis - Ask a Physician 08/09/2000 [view full text HERE]
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