How do A positive and O positive blood types differ?

For most of human history we thought that all blood was the same. In fact, it wasn't until the 20th century that we found out that was incorrect. read more

Basically a type A person has an extra carbohydrate (labeled “A”) on their red blood cells. Type O does not. (I always think zero instead of the letter O.) A type A person makes anti-B antibodies. A type O person makes both anti-A and anti-B antibodies. Below is a bit more detailed description. read more

O positive is a blood type that don’t have the A or B markers and has a Rh factor. It don’t have antigens in red blood cells. It has anti-A antibodies and anti-B antibodies and thus act against A and B blood types. read more

O Positive vs O Negative Human blood can be classified into four different types of groups according to the antigen in the cell surface of the red blood cells. In 1900, Landsteiner found the two types of antigens called type A and B. read more