Have you noticed that some people are using old outdated 'evidence' to try to convince people things about Rh negative blood? For instance one known disinformation agent is trying to convince people of things by pointing to this old book, published in 1994, and the research in it was done a long time before that. Things have changed a LOT since then, in the past 5 years alone the history books are having to be rewritten as Scientists learn more about DNA and genetics. Always check your sources and the date of those sources and look into the person who is providing them, and ask yourself why they want to you to believe it.
History And Geography Of Human GenesBy L. Luigi Luca Cavalli-Sforza, Paolo Menozzi, Alberto Piazza