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Sure, that isn’t exactly a low number, but I would have expected much higher frequencies.
Were the numbers a lot higher at one point?
Did the potato famine kill more Rh negatives or were Rh negatives more likely to migrate?
Either way, Northern Ireland remains at more than 27% Rh negative.
The Irish and the Scottish are also reasons for high Rh- frequencies in Australia.
While Celtic Nations tend to have high percentages of Rh- blood, Wales seems to also have no higher numbers than the European average.