What makes type o blood universal donor

That leaves us with eight possible blood types:. Each of these eight types is unique. Blood types determine who you can give blood to and receive blood from.

Which type of donation is best for you is determined by your blood type, as well as patient need. Read more to find out what makes your blood type special:.

Is one of the rarest blood types — only 6. Now that you know how your blood type can help recipients, please schedule an appointment to donate today. Blood Types. Download Guide. Blood Types and Transfusion Each year 4. Every 2 seconds someone in the US needs a blood transfusion. Use the interactive graphic below to learn more about matching blood types for transfusions. Donate and find out. Schedule Your Appointment. View all child parent pairings. Medical Review: E. This information does not replace the advice of a doctor.

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Skip Navigation. Top of the page. Test Overview Blood type tests are done before a person gets a blood transfusion and to check a pregnant woman's blood type. If your red blood cells have: The A antigen. The B antigen. Neither the A nor B antigen. Both the A and B antigens. Rh test Rh blood type checks for the Rh antigen also called the Rh factor on red blood cells. If your red blood cells: Have the Rh antigen, your blood is Rh-positive.

Do not have the Rh antigen, your blood is Rh-negative. When a woman is planning to become pregnant or first becomes pregnant. Before you donate blood. Before you have surgery. In some cases, it is used if the O negative blood is not available. In contrast with O positive blood, O negative blood is relatively rare. Only about 1 in 15 people approx. Universal donors play an important role in meeting this need and saving lives. Are you a universal donor?

Make an appointment today and find out your blood type.