What is the significance of the Kell blood group system in transfusion medicine, particularly in relation to delayed hemolytic transfusion reactions?

A It is the most common cause of delayed hemolytic transfusion reactions ✓
B It is associated with a high risk of acute hemolytic transfusion reactions
C It is not clinically significant in transfusion medicine
D It is only relevant in pregnancy-related transfusions

Explanation

The Kell blood group system is a complex system with several antigens, and anti-Kell antibodies can cause delayed hemolytic transfusion reactions, making it significant in transfusion medicine.

Source

Transfusion Medicine textbooks
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: high