Don't take these maps too seriously there's plenty of contrary information but the Basques are famous for high percentage of RH negative blood.

Apparently O is the original blood. But finding the truth about + & - is a lot harder. Some of the disinformation was probably on purpose as the vast majority of the 'elites' are rh negative and we all know how they feel about us knowing certain stuff. I read that all of the US presidents (since they started testing) had Rh negative blood except George W Bush
