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What Is the Most Common Blood Type?

Paul Ramey
August 3, 2021

There are eight different blood types and each one holds a unique power to save lives.

But the most common blood type is O+, accounting for more than a third of all people (37%). This means there is a higher demand for this blood type when it comes to blood transfusions.

Why are there different blood types?

There is evidence that the different blood types have evolved over millions of years, with type A being the most ancient.

The difference between the various blood types comes down to sugars that cover the surface of red blood cells. These sugars can be misinterpreted as foreign invaders by the body’s immune system when they don’t match up correctly, making a mismatched blood transfusion potentially deadly.

For this reason, it is extremely important to find a compatible blood match for transfusion patients. With O+ being the most common blood type, having an available blood supply is critical. 

A OneBlood blood type compatibility chart detailing the percentage of the population who has each of the blood types, the blood types you can receive, who can receive your red cells, who receive your platelets, and who can receive your plasma.

What is the best donation procedure for those with O+ blood?

Those with O+ blood type (who meet certain criteria) are encouraged to choose Double Red Cell Donation. This kind of procedure takes twice as many red blood cells from the donor while leaving the platelets and plasma behind.

It’s an efficient way for O+ donors to get more bang for their donation buck by helping to save even more lives!

Those who are unable to meet the height/weight requirements for Double Red Cell Donation may still complete a traditional Whole Blood Donation. This procedure utilizes red blood cells, platelets, and plasma, and one donation can help save up to three lives!

Discover how you can best help those in your community by targeting your blood type and learning which donation method is best for you!


Paul Ramey

Paul Ramey is a OneBlood Graphic Designer, as well as a published author (Edgar Wilde and the Lost Grimoire). Paul is very proud to be part of OneBlood’s lifesaving team.

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