Different blood types are prevalent in different parts of the world. In the United States, AB-negative is the rarest blood type, while O-positive is the most common. Your blood type is based on ...

Dr. Karl Landsteiner won the Nobel prize in 1930 for developing the ABO blood group system. The ABO system is the best known method of classifying blood types. It’s important to know your blood type ...

More recent studies suggest there is no significant link between blood type and COVID-19 risk. Read more in our article on those studies. In the new study, researchers sequenced the genomes of ...

Most people don’t spare a thought for their blood type unless they’re in need of a transfusion — but could yours hold secrets to your health? There are four main blood types: A, B, AB and O.

Red blood cells are complex — there's much more to blood types than A, B and O. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Many people know ...

Here’s what you’ll learn when you read this story: There are rare blood types beyond the eight most common ones, and researchers have discovered one more that brings the total count to 49. Blood type ...