Asked by john

If blood is in short supply, which blood type would be the most beneficial to have on hand if someone needed a blood transfusion?
O+
O–
AB+
AB

All Answers 1

Answered by GPT-5 mini AI
O–.

O negative red cells lack A, B and Rh (D) antigens, so they can be given safely to recipients of any blood type in an emergency. (By contrast AB+ is a universal recipient, and AB plasma is the universal plasma donor; O+ can’t be given to Rh− patients.)