Not all blood is alike. Learn about blood typing and the rarest and most common types of blood and how they can impact your blood donation.

Blood group O-positive (O+) is the most common blood type among Americans. About 43 percent of Americans have an O blood type of which O-positive accounts for about 38 percent of the …

Are you type O+ or O-? Learn the facts about what makes your blood type special!

Blood type b is antigen of o Blood type (or blood group) is determined, in part, by the ABO blood group antigens present on red blood cells. A blood type (also known as a blood group) is a …

Type O: Red blood cells have neither A nor B antigens. Blood types are either “positive” or “negative,” depending on the absence or presence of the Rh factor’s D antigen, another …

Nearly 40% of Americans have O positive blood — that's 1 out of every 2.5 of us! O positive blood can be transfused to any Rh-positive blood type (A+, B+, AB+ and O+), making it critical for …

Aug 5, 2025 · Individuals with blood group O lack both A and B antigens on their red blood cells and produce both anti-A and anti-B antibodies in their plasma. This immunological profile …

O- is the universal blood type. This means that any patient with any of the 8 blood types can receive O- blood to help them through treatments or trauma accidents.

Dec 7, 2025 · Eight blood types are divided into four categories: A, B, AB, and O, and whether you're Rh positive or negative. Learn what these classifications mean.

Dec 20, 2025 · Type O blood: Has no A or B antigens on red blood cells' surface but has both anti-A and anti-B antibodies in the plasma