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 · June 30, 21 Patients with blood type Lewis (a−b−) or O were significantly less likely to be hospitalized (odds ratio 0669, confidence Read More Rh Negative Facts · A theory presented on AncientOrigins suggests that the Rhnegative gene represents a completely separate branch of humanity that interbred with the "original" branch that came out of Africa, this theory also suggests that those with the RhNegative blood are descendants of the Hyperborean race, which is believed to be the real, original human raceAB negative donations are extremely versatile, but because it is the rarest blood type finding new donors can be a challenge Plasma from AB negative donations can help treat patients of all blood types, however fresh frozen plasma is only produced from male donations This is because female donors (especially those who have been pregnant) can develop antibodies that, while no danger Rh Negative Blood Are We Different Rh negative blood type facts uk