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What is the universal blood donor type?

Retry Correct Incorrect Type O- blood lacks both A and B antigens and is considered the universal red cell donor. Blood types are named by whether the A or B antigens are present, as well as a protein called the Rh factor, which is where the + or – come from.

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What is the universal blood donor type?

• Type AB+
• Type A+
• Type O-
• Type B-