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.

The ABO blood types were first discovered by an Austrian physician, Karl Landsteiner, working at the Pathological-Anatomical Institute of the University of Vienna (now Medical University of Vienna).

There are eight blood types included in the ABO and Rh blood group systems: A positive (A+), A negative (A-), B positive (B+), B negative (B-), AB positive (AB+), AB negative (AB-), O positive (O+), …

Nov 11, 2025 · ABO blood group system, the classification of human blood based on the inherited properties of red blood cells (erythrocytes) as determined by the presence or absence of the …

Feb 19, 2025 · Learn what determines your blood type and why it's important. Understand blood type compatibility, donation guidelines, and the need for safe transfusions.

Nov 28, 2023 · Learn about blood types, including A, B, AB, O and Rh+ and Rh-. See which blood type is the universal donor and universal recipient.

Nov 20, 2025 · The ABO/Rh test is the standard procedure used to determine an individual’s blood type. This classification system is based on the presence or absence of specific markers, known as …

Mar 7, 2025 · Blood type classification uses the ABO system. This system determines blood type based on the presence or absence of A and B antigens on the surface of red blood cells.

Nov 29, 2025 · The ABO system is the most significant method for classifying human blood, based on inherited characteristics found on the surface of red blood cells. This classification is foundational in …

Dec 7, 2025 · There are eight primary blood types determined by the ABO system and the Rh factor, which dictate the antigens present on red blood cells. These are crucial in the case of blood …