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  2. Learn about the four main blood types (A, B, AB and O) and how they are determined by antigens and Rh factors. Find out how common blood types are in the U.S. and how they affect blood donation and transfusion.

  3. Learn about the most common and rare blood types in the U.S. and how they vary by race or ethnic background. Find out why blood type matching is important for blood transfusions and how to donate blood.

  4. Sep 15, 2023 · Learn how blood types are identified by letters and signs, and what they mean for your health and transfusions. Find out how common or rare your blood type is, and how it affects your pregnancy and COVID-19 risk.

    • Nancy Lebrun
  5. Mar 29, 2024 · Learn about the rareness and compatibility of different blood types, including B positive, which is one of the most common blood types. Find out how you can donate blood and help save lives with your blood type.

  6. Learn how blood types are determined by antigens and Rh factor, and how they affect transfusions and donations. Find out how common B positive blood type is in the U.S. population and other facts about blood and diversity.

  7. About 9% of the population have B positive blood, which can be given to B positive, AB positive, O positive and O negative patients. Learn more about B positive blood type, its compatibility and why donations are important for patients who need blood transfusions.

  8. Learn about the rarity, compatibility and importance of B blood types. Only 9% of the U.S. blood donor population has B-positive blood, and only 2% has B-negative blood.

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