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<http://schema.org/description>
"The blood group AB is considered the youngest one among the 3 other blood types. It appeared as a result of blending together of the blood groups O and A. This blood type provides people with a flexible immune system. So it seems that being a vessel of such an unusual blood group is cool. But the"
<https://quizzclub.com/trivia/what-is-the-rarest-blood-type/>