It’s not uncommon for humans to be missing one of these antigens. The 342 known antigens belong to 35 blood group systems, of which the Rh, or ‘Rhesus’, system is the largest, with 61 antigens. If someone lacks an antigen that is found in 99 percent of all humans then their blood is considered rare, and if they lack an antigen found in 99.99 percent of humans, their blood is considered very rare. Around 160 of these antigens are considered common, meaning they are found on the red blood cells of most humans on the planet. On the surface of every one of our red blood cells we have up to 342 antigens – the molecules that trigger the production of certain specialized proteins called antibodies – and it’s the absence of certain antigens that determines a person’s blood type. Human blood may look the same in everyone, but it’s actually very different. To understand golden blood it’s important to understand how blood types work.
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