What was Charles Drew greatest achievements?

Charles Drew was a pioneering African American surgeon and medical researcher best known for his significant contributions to the field of blood transfusion and the development of blood banks. He established the first large-scale blood bank during World War II, which greatly improved the treatment of wounded soldiers. Additionally, Drew advocated for the use of blood plasma in transfusions, emphasizing the importance of safe and effective blood storage. His work not only advanced medical practices but also highlighted racial inequalities in healthcare, leading to changes in policies regarding blood donation.