Blood groups are an important aspect of the human body and play a crucial role in transfusions and transplants. They are determined by the presence or absence of specific proteins called antigens on the surface of red blood cells. There are four major blood groups: A, B, AB, and O, each of which can be classified as positive or negative, depending on the presence of the Rhesus (Rh) antigen. Let's take a look at the global prevalence of these blood groups.
Blood Group O: The Most Common Blood Type
Blood group O is considered the most common blood type worldwide. Approximately 40% to 45% of the world population has blood group O. People with blood group O do not have A or B antigens on their red blood cells, making their blood considered as "universal donor." This means that people with blood group O can donate blood to individuals with all other blood groups.
Blood Group A: In Second Place
Blood group A ranks second as the most common blood type in the world. About 30% of the world population has blood group A. People with blood group A have only the A antigen on their red blood cells and can safely donate their blood to other individuals with blood group A and AB.
Blood Group B: Less Common
Blood group B is less common than blood groups O and A. Approximately 20% of the world population has blood group B. People with blood group B have only the B antigen on their red blood cells and can safely donate their blood to other individuals with blood group B and AB
Blood Group AB: The Rarest Blood Type
Blood group AB is considered the rarest blood type in the world. Only about 5% to 10% of the world population has blood group AB. People with blood group AB have both the A and B antigens on their red blood cells and are therefore considered "universal recipients." They can receive blood from all other blood groups.
in Blood Group Frequency It is important to note that the frequency of blood groups can vary depending on geographic location and ethnic background. In some populations and regions, certain blood groups may be more common than others. These regional variations may be related to genetic heritage and migration patterns of population groups throughout history.