Understanding your blood type
Everyone has a type. You belong to one of four: O, A, B and AB. An additional factor — the ‘Rh factor’ — determines whether your type is positive or negative. Knowing your blood type is important not only because it determines who you can donate blood to but also who you can receive blood from.
What’s your blood type?
A-positive blood is the second most common blood type in Canada — 36% of Canadians share this blood type.
Patients who are A-positive and AB-positive can receive A-positive red blood cells and platelets. Maintaining an adequate supply is crucial.
A-negative blood is one of the rarer blood types — only 6% of Canadians share this blood type.
A-negative blood type contains red blood cells that can be used to save patients with A-negative, A-positive, AB-negative and AB-positive blood types — almost half of all Canadians.
This blood type is the third most recurring blood type in Canada — only 7.6% of Canadians share this blood type.
B-positive red blood cells can be given to B-positive and AB-positive patients.
B-negative blood holds tremendous power — only 1.4% of Canadians share this blood type.
B-negative red blood cells can be used to help patients with B-negative, B-positive. AB-negative and AB-positive blood types — nearly 12% of the population.
AB-positive patients can receive red blood cells from donors with any blood type and 2.5% of Canadians share this blood type.
Donors who are AB-positive are considered the universal plasma donors because this blood component can be transfused to any patient, regardless of their blood type.
AB-negative blood can receive red blood cells from donors with any other Rh negative blood type — only 0.5% of Canadians share this blood type.
Donors who are AB-negative are the universal platelet and plasma donors because these blood components can be transfused to any patient.
This is the most common blood type in Canada — 39% of Canadians share this blood type.
O-positive red blood cells can be used to treat any patient with a positive Rh blood type, which makes a measurable difference in emergency situations.
Only 7% of Canadians share this blood type — a small percentage with a huge impact.
O-negative red blood cells are compatible with all other blood types. This means that in critical emergencies — when there is no time to confirm a patient’s blood type — O-negative blood can make a lifesaving difference.
Don’t know your blood type?
Every donor is tested as part of the blood donation process to identify exactly which type they belong to. Book your appointment to donate blood and find out.
Rare blood program
Did you know that some people’s blood is rarer than others? It’s not just about being type A, B, O or AB. On the surface of our red blood cells are proteins called antigens. There are more than 600 known antigens — and some combinations of antigens are far less common than others.
Whenever a blood transfusion is required, time is of the essence. But if someone in need has a rare blood type, finding a matching donor can be hard. Through our rare blood program, we make sure lifesaving rare blood is available to patients whenever and wherever it’s needed. To deliver on that promise, we need everyone with rare blood to donate regularly.