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What is the rarest blood type in the world? — Health Trivia




Health Vol. 29

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What is the rarest blood type in the world?

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Who developed the first antiseptic procedures in surgery, greatly reducing post-operative infections?

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Which vitamin is essential for blood clotting?

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What is the leading cause of preventable death worldwide?

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Which device, invented by Willem Einthoven in the early 20th century, measures the electrical activity of the heart?

Did You Know? It’s hard to imagine just how important blood donations are, but according to the American Red Cross, someone in the U.S. is in need of blood every two seconds.



  1. Barbara

    September 18, 2023 at 1:55 pm

    The AB – is what my answer but you tell me I didn’t get it right

  2. Steve

    November 7, 2023 at 12:38 pm

    AB- is the correct answer.
    There are several more of these quizes that also report a correct answer as being incorrect.
    However, what can you expect for free?

  3. jerry1944.

    April 25, 2024 at 1:03 am

    I use to donate 3 times yr when younger at 80 wonder can i still

  4. Stephen

    April 30, 2024 at 4:31 am

    I think there was an error regarding AB- blood type. You said that it is the rarest blood type because for a person to have it one would need to inherit both the A & B antigens as well as the RH factor. I would think that one with AB – blood type would not inherit the RH factor. I thought that the + sign means you have the RH factor and the – signs means you do not. My blood type in O – and is considered to be a universal donor blood type due to having no antigens without the RH factor.

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