Important Types of Blood



There are the main A, B, AB and O types of blood that affect transfusions. There are also Rh factors that can affect donating blood. What are some other types of blood?

All blood types are inherited from the parents, and a child's blood type options can be determined by knowing the blood types of the parents.

ABO
The A, B, AB and O blood types are the most commonly known, because they are so critical for blood transfusions. The blood types must match well for a transfusion to be successful.

Type B Blood
Yersinia pestis was the plague bacteria carried in by the rats to London - and it is extremely similar to the B membrane. Therefore most people who died from the plague had type B blood because their bodies did not recognize the "invader" as being bad.

Type A Blood
Smallpox is very similar to the Type A membrane, so those with Type A blood do not fight off smallpox effectively and are more susceptible to it. Studies also show that Type A blood people have higher rates of stomach cancer.

Rh
A person can be Rh positive or Rh negative. If a person has ++ or +- in their Rh factor, they are positive. It is only if a person is -- that a person is Rh negative.

Duffy
The Duffy blood type (positive or negative) affects your chance of falling victim to malaria. A person with a positive Duffy surface on their blood will not recognize the malaria virus as being "bad" - since they are similar. Malaria will therefore have an easy time in invading the body.

Lewis
The Lewis blood type affects how you react to Helicobacter pylori - the bacteria responsible for stomach ulcers. The bacteria looks almost exactly like the Lewis membrane, so people who have the Lewis membrane do not fight off the Helicobacter pylori. The result? A damaged stomach.

Diego
Only Native Americans and East Asians seem to have the Diego factor in their blood, which has helped to prove that Native Americans did indeed originally come from Asia and cross the Alaskan land bridge, thousands of years ago.

More about Blood Types
Blood Types, Inheritance and Paternity
Blood Type Distributions Around the World
Blood Types and Transfusions
Blood Types and Illnesses
Evolution of Blood Types



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