Dr. Karl Landsteiner (Immunologist)

Dr. Karl Landsteiner was an Austrian immunologist and pathologist, best known for discovering blood groups in the early 20th century. His pioneering work led to the classification of blood types as A, B, AB, and O, which is critical for safe blood transfusions. This discovery not only improved medical practices but also advanced the understanding of immune responses. Landsteiner received the Nobel Prize in Physiology or Medicine in 1930 for his contributions to immunology, laying the groundwork for modern blood transfusion science and the study of the immune system. His legacy continues to impact healthcare today.