In addition, red blood cells are classified according to the presence or absence of a protein called Rhesus. The four types of blood cells are classified according to the A and B antigens: blood type A carries antigen A, blood type B carries antigen B, and AB carries both. Test tubes, taken by a health care worker, with plasma and blood samples after a separation process in a centrifuge during a coronavirus vaccination study at the Research Centers of America, in Hollywood, Florida, US, September 24, 2020. The blood types are characterized by antigens that are on the cell membrane and trigger an immune response in contact with an environment that is not compatible with them. Sometime over the years another blood type developed - a blood type that has expression of both sugars together and is known as AB. 2.5 million years ago, another mutation to the gene that is responsible for the type of sugar that the blood cells have, led to the formation of blood type O, whose cells do not have the sugar that causes the formation of blood type A or B. Type B developed about 3.5 million years ago from a genetic mutation that occurred in one of the sugars on the surface of red blood cells. Blood type A is the oldest, and existed even before the human race evolved from our ancestors. To understand why this type is so rare and expensive, you need to understand a little about blood types. The blood, known as Rhnull (or Rhesus null), is often referred to as "golden blood" due to its rarity and great value. There is a blood type so rare that only 43 people in the world have it, and only nine of them donate blood. LIORA BARZAG PERU/WALLA!Ī blood bank at a local hospital in Rwinkwavu, Rwanda. Jerusalem Post Health & Wellness 'Golden blood' - only 43 people in the world have this rare blood type If you have type AB blood and you are used to hearing how rare it is, you will be surprised to hear that there is one type even rarer. Israel News Health & Wellness WORLD NEWS Middle East Business & Innovation Opinion Archeology Login Log Out (function (a, d, o, r, i, c, u, p, w, m) ` (script) Advertisement 'Golden blood' - only 43 people in the world have this rare blood type - The Jerusalem Post
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