“It was about the third date my freshman year in college, and I’m lying in bed with this fantastic guy,” says Ellie.
“We talked politics and made fun of each other and he took these great black-and-white photographs of me. He’s still totally dreamy.”Welcome to the third date, that moment on the courtship trajectory when the truth comes out about STDs, personal hygiene habits, secret significant others, family backgrounds, and, yes, their real age.
Such antigens are termed as Rare blood group is a concern when blood transfusion is to be done on a regular basis, for example in patients with thalassemia, leukemia and other blood-related diseases, as well as certain emergencies like accidents, surgical complications, etc.
This gives rise to O, A, B and AB groups, which are further classified into two types each, depending on the presence of Rh factor.
Of these AB- phenotype has been observed to be present with the lowest frequency.
Certain blood groups are more common in the African population but may be rare amongst Americans.
However, there also exist certain extremely rare blood types arising due to genetic mutations, with single cases or individuals belonging to a specific family.
As of today, more than 30 blood type systems have been identified including ABO, Rhesus, MNS, Kell, Lewis, etc.