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.

Calls for blood donors never seem to end. Especially in summer, when people are on vacation and out of normal routines, blood drives suffer. But Dr. Ify Osunkwo, a specialist in sickle cell disease, ...

Recent research suggests blood type may influence how our bodies respond to different foods, impacting everything from digestion to metabolism. This understanding proves particularly relevant for the ...

More than 100 years ago, Dr. Karl Landsteiner discovered that not all red blood cells are alike. He found that, when different people's blood was mixed, it would often clump up and curdle, destroying ...