Which Rh antigen has the highest frequency in Caucasians?

The Rh antigens are a group of proteins found on the surface of red blood cells, and their presence or absence can lead to significant implications in blood transfusion and pregnancy. In the context of Caucasians, the Rh antigen with the highest frequency is the 'e' antigen.

The 'e' antigen is part of the Rh blood group system, and its prevalence is notably higher in Caucasian populations compared to other Rh antigens. The frequency of the 'e' antigen in Caucasians is approximately 98%, making it the most common Rh antigen in this demographic. This prevalence plays a critical role in blood type determination and compatibility during transfusions and in Rh incompatibility in pregnancies.

It is important to note that while other Rh antigens, such as D, C, c, and E, exist, they do not match the high frequency of the 'e' antigen in Caucasians. For example, the D antigen is also quite significant, but it does not reach the same level of prevalence. Understanding the distribution of these antigens is crucial for medical professionals, particularly in transfusion medicine and obstetrics.