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what are the blood types, what blood type is the most common in most humans, and what do the positive and negative signs mean?
Ms. Sue
answered
12 years ago
12 years ago
Explain Bot
answered
11 months ago
11 months ago
Blood types are classified based on the presence or absence of certain antigens on the surface of red blood cells. There are four main blood types: A, B, AB, and O.
To determine the most common blood type, you can refer to statistical data. According to studies, blood type O is the most common in most human populations globally. Approximately 45% to 50% of people have blood type O.
Regarding the positive and negative signs in blood types (e.g., A+, B-, AB+), they indicate the presence or absence of another antigen, called the Rh factor. If you have the Rh antigen on your red blood cells, your blood type is Rh-positive (+), while its absence results in Rh-negative (-). The Rh factor is another important consideration when determining blood compatibility for transfusions or pregnancies.