What does it mean to have a blood type RhD positive? Is it normal?

Generally, RhD positive blood type refers to the presence of D antigen on the surface of red blood cells within the Rh blood group system, which is typically normal. Detailed analysis is as follows:

RhD positive blood type indicates the presence of D antigen on the red blood cells of the individual being tested, which is one of the expressions of the Rh blood group system. The Rh blood group system includes multiple antigens; if D antigen is present on the red blood cell surface, the blood type is called RhD positive. Conversely, if there is no D antigen present, it is referred to as RhD negative. In China, the majority of people are RhD positive. The RhD negative blood type is relatively rare in the population and is therefore known as "panda blood."

RhD positive blood type is generally considered normal. From a genetic perspective, RhD positive blood type also follows the genetic laws of humans. Each person's blood type is determined by genes inherited from both parents, and the RhD gene is a key factor determining the presence of D antigen in the Rh blood group system. Since the RhD gene is a dominant gene, only inheriting this gene from one parent is sufficient for an individual to express the RhD positive blood type.

When blood transfusion or other medical procedures are needed, doctors will select appropriate blood or treatment plans based on the patient's blood type to ensure safety and effectiveness.