Blood and Blood Types

Every person needs a healthy supply of blood. But, not every person's blood is exactly the same.

Human blood falls into four different blood groups: A, B, AB, and O. Your blood also has what is known as an Rh factor: It either contains a certain protein or it doesn't. (This is the positive [+] or negative [-] after your blood type.) The possible combinations create eight different blood types: A+, A-, B+, B-, AB+, AB-, O+, and O-.

You don't need to know your blood type to donate blood. Donating blood is a great way to find out your blood type - will tell you after you donate. And, whatever your type, every donor is needed, and every donation transforms lives including your own!