Final answer:
O-negative blood is the universal donor type, and O-positive blood is the next best choice. Rh factor compatibility is key in blood transfusions.
Explanation:
O-negative blood is considered the universal donor type because it lacks A, B, and Rh antigens, reducing the risk of transfusion reactions. In cases of depleted O-negative blood supplies, the next-best choice would be O-positive blood, as it can be given to A+, B+, AB+, and O+ recipients.
Rh factor plays a crucial role in transfusions, with Rh+ individuals being able to receive Rh+ or Rh- blood, while Rh- individuals should only receive Rh- blood to prevent immune responses.
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