RH Negative blood type (edited)

What's the deal with this blood type? I've been told that since I'm RH negative, I need a shot if I have a baby or a miscarriage, the reason being that my body would build antibodies that would kill or disform any future pregnancy if the father was RH positive. I remember years ago I was told that I would DIE if I didn't have the shot, now the story is different. So what's the real scoop in this, anyone know? I find it quite odd.
Oh sorry I didn't realize this forum was about diet, but any input is appreciated!


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