O- Blood Type

Only 9% of the population is O-.
O- is the universal donor. Anyone can receive O- blood, which means O- whole blood can be transfused to all blood types!
O- patients can only receive O- transfusions.
Type O is routinely in short supply and in high demand by hospitals.
O- blood is often transfused in trauma situations when doctors don’t have time to check a patient’s blood type.
O- blood is the universal blood type needed for immune deficient infants.
Because of the huge number of people who can receive O- blood, these donors are excellent double red cell donors.
People with type O blood are generally protected against severe malaria.

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