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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.
Simply put, people with blood type O+ can donate blood to A+, B+, AB+ and O+ people, while people with blood type O-, which is often referred to as the universal donor, can donate blood to people with any blood type. Occurrence. One of the most commonly found blood types in the world is O positive.