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Strange facts about RH negative blood

Updated April 17, 2017

Rh-negative blood is a very rare blood variety. Although most people are a certain blood type (A, B, AB, O) and Rh positive, those with Rh-negative blood share some interesting and strange characteristics.

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Rh, or Rhesus, is a protein that is on the red blood cell surface of most individuals. People who have the protein are Rh positive, while not having it makes them Rh negative.


A Rh negative pregnant woman with an Rh positive foetus has the risk of her baby dying. This is from damage to the baby's erythrocytes.


Rh-factor protein is divided among races. Fifteen per cent of whites are Rh negative, 5 to 10 per cent of African Americans are Rh negative, and 1 to 2 per cent of Asians are negative for the protein.

Blood Distribution

Rh-positive blood is most commonly distributed through the population. Rh-negative numbers are 7 per cent for blood type O, 6 per cent for blood type A, and 2 per cent for blood types B and 1 per cent for type AB.

Highest Rh negative Rate

Those with the highest Rh-negative rate are a branch of people in Europe called the Basques. Basques have almost double the European rate (which is abnormally high to begin with) of Rh-negative people.

Fun Fact

A higher percentage of Rh-negative people claim to have been abducted by aliens than that of Rh-positive people.

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About the Author

T.M. Samuels has been a freelance writer since 1993. She has published works in "Arthritis Today," "Alabama Living" and "Mature Years," and is the author of a gardening book. Samuels studied pre-medicine at Berry College.

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