Question

What is the rarest blood type?

Answer 1

Answer:

Every drop of blood contains red blood cells, which carry oxygen throughout your body. It also contains white blood cells, which help fight infection, and platelets, which help your blood clot.

But that’s not where it ends. Your blood also contains antigens, which are proteins and sugars that sit on red blood cells and give blood its type. While there are at least 33 blood typing systems, only two are widely used. These are the ABO and the Rh-positive/Rh-negative blood group systems. Together, these two groups form the eight basic blood types that most people are familiar with:

A-positive

A-negative

B-positive

B-negative

AB-positive

AB-negative

O-positive

O-negative

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Answer 2

Answer:

Write any four sources to know history