Agencies-Gaza post
WHY is blood type B-negative the rarest?
The fourth positive kind is much more familiar. The fourth group in general is a mystery because it came from the fusion of two very different kinds, A and B. It is a young group, and people with it have a flexible immune system.
This group is special in that it emerged not because of the influence of the external environment but as a result of mixed marriages. It is worth mentioning that this group is the most biologically complex.
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Antigens sometimes make it similar to the second, and sometimes even to the third. Occasionally, it also occurs that this rare group is something like a combination of both of these groups.
Thus, the fourth blood group is thought to have appeared later than all the others, about a thousand years ago, as a result of the mixing of Mongoloid and Indo-European.
