Negative RH factor: it may not belong to the Human Race

One of the most recent theories states that human beings with the negative RH factor would be part of an extraterrestrial lineage.

We know that people have four blood groups: A, B, AB and 0. The Rh factor, or Rhesus factor , refers to the presence of an antigen (protein) on the surface of red blood cells. It is a hereditary character and is transmitted as an autosomal dominant: s and a person has this factor it is said that his group is Rh positive (Rh +), if instead the protein is not present on red blood cells the group is called Rh negative (Rh- ).

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