All matter can be broken down to particles, all particles have a positive or negative charge. It is said that those with negative blood types are setting off high levels of negatively charged energy around us, almost like a small bubble of charged space. It is an energy that does not mix well with pos biological matter, like bacteria and viruses. When we are attacked by a virus that bubble of negatively charged energy gives a coat of protection, like wearing a sweater in a light rain. It will catch most of it but occasionally some rain is going to seep through. But we also have another aspect that helps us. Our negative blood.
Negative blood types attack all positive boi matter, and as far as I can tell EVERY living thing on the planet is positive bio-matter except for people with negative blood types We already have some immunities from vaccination, but what negative blood does is amazing and should really be researched more. The blood will actually attack pos bio-matter and win most everytime. It is such a harsh phenomenon that the blood of an RH- woman carrying a baby, will attack and kill that baby, if it's blood is positive. The blood of those with Rh- factor recognizes positive bio-matter as a threat on a molecular level.
Like I said, I am not a scientist, so I have no way of proving any of this, and this is a simplified way of explaining my understanding of it, and it makes sense as a theory, like I said someone needs to do some hard core research on it and for starters find out where it came from, no one has done that yet, they just say it doesn't appear indigenous.