FORT LEONARD WOOD, Mo. — A child with a rare blood disease; an adult injured in a vehicle accident; someone with cancer; and a warrior injured on the battlefield all have something in common. They all ...

Tens of thousands of people have already volunteered to donate blood. But donations will also be needed in the coming weeks.

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.

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 ...

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 ...