These are your Rhesus, or Rh antigens, named after the species of monkey they were first identified in.

这些是你的 Rh，或 Rh 抗原，以它们首次被发现的猴子物种命名。

Interestingly, 99.999 9994 percent of people in the world have blood with Rh antigens on their red blood cells.

有趣的是，世界上99。9999994%的人的血液红细胞上都有Rh抗原。

As Rhnull blood contains no Rh antigens to be rejected, it can be a universal donor for those with generally rare blood types.

由于Rhnull型的血液不含会被排斥的Rh抗原，它可以为那些拥有罕见血型的人提供通用供体。

Much like A and B, you either have the Rh antigens, in which case you're Rh positive, or your don't, and are Rh negative.

就像 A 和 B 一样，你要么有 Rh 抗原，在这种情况下，你是 Rh 阳性，要么没有，是 Rh 阴性。

This means if you have the Rhnull blood type, receiving a transfusion of a blood type with any Rh antigens will cause your body to reject the blood.

这也就意味着，如果你是Rhnull血型，接受任何带有Rh抗原的血型输血都会导致你的身体排斥这种血液。

Instead, a person with Rh negative blood needs to be 'sensitized' before he or she will start to produce antibodies to the Rh antigen.

相反，一个Rh阴性的人在开始产生对Rh抗原的抗体前需要被" 致敏" 。

So you might think that the Rh blood group would be the same way and assume that if you are born without the Rh antigen that your body would automatically make antibodies against it.

所以你可能会认为Rh血型是相同的，并假设如果你出生时没有Rh抗原，你的身体会自动产生抗体。

If you have a woman with Rh negative blood who has never had a blood transfusion or any other exposure to anyone else's blood, she will not have any antibodies against the Rh antigen.

如果有一个Rh阴性的妇女，她从来没有输血或接触过其他人的血液，她不会有任何抗Rh抗原的抗体。