Transfusion medicine is the branch of medicine that involves the collection, testing, storage, and administration of blood and blood products to patients who require transfusions. This field encompasses various aspects of blood transfusion, such as determining blood compatibility, managing transfusion reactions, and ensuring the safety and quality of blood products. Transfusion medicine also includes procedures such as apheresis, which involves separating specific blood components for donation or therapeutic purposes. This area of research is vital in treating patients with various medical conditions or undergoing surgical procedures that require blood transfusions to support their health and wellbeing.