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Best Answer: O positive ok for transfusing to all positive types. O negative is a unversal to all types. So you cannot donate blood for an O negative if you are O positive. If you just want to donate plasma then you can donate, just not whole blood.
There are 4 different blood types (A, B, O, &amp; AB). Each blood type can either be Rh positive or Rh negative. (e.g., A+, A-, B+, B-, O+, O-, AB+, AB-). <br /><br /> Blood type AB is the universal receiver when it comes to donating blood. That means anyone can donate blood to a person with AB blood.