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Understanding different blood types: A, B, AB, and O

There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is important for safe blood transfusions and organ transplants. Type ...

Why Do We Have Blood Types? Hint: Scientists Are Still Debating The Answer

There’s more history in your blood types than you think, and it didn’t begin with humans. Here’s what we know about them, ...