Charles R. Drew, American physician and surgeon (born 1904)

Charles Richard Drew was an American surgeon and medical researcher. He researched in the field of blood transfusions, developing improved techniques for blood storage, and applied his expert knowledge to developing large-scale blood banks early in World War II. This allowed medics to save thousands of Allied forces' lives during the war. As the most prominent African American in the field, Drew protested against the practice of racial segregation in the donation of blood, as it lacked scientific foundation, and resigned his position with the American Red Cross, which maintained the policy until 1950.

April 1 is the 91st day of the year in the Gregorian calendar; 274 days remain until the end of the year.