Once again it seems rh negative people are not only more sensitive, but it being a good thing considering we are not really sure as to just how bad the effects of radiation can be and our sensitivity may be a protective thing unfortunately missing in most and with that protecting us when early recognized.
Rh factor is associated with individual radiosensitivity: A cytogenetic study. concludes:
The Rh factor might be a predicting marker in an individual’s radiosensitivity to ionizing radiations.