A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body," according to American Red Cross.

Breast cancer remains the most diagnosed cancer among women worldwide. While lifestyle and genetic factors are well-known contributors, researchers are now zeroing in on something more unexpected – ...

There’s more history in your blood types than you think, and it didn’t begin with humans. Here’s what we know about them, ...

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? And is one better than the others? There are four main ...

Medically reviewed by David Hampton, MD Key Takeaways O- blood is the universal donor type because it can be used for anyone.AB+ blood can receive any type of blood, making it the universal recipient.