O-negative Blood Group and Blood Donation
O-negative blood group is the "universal donor" blood group. This means that a person with any blood group can receive O-negative blood. This is very important in emergency situations when a person requires immediate blood transfusion and there is no time to test his/her blood group. Such person can be transfused an O-negative blood.
People with O-negative blood group can only receive O-negative blood. Therefore, occasionally it might be difficult to find O-negative blood for transfusing an O-negative person.
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