Marquita Gaines is a 20-year-old college student with sickle cell disease . Sickle cell disease is a genetic blood disorder that can cause severe pain . I arrived on an outpatient basis , and a trained nurse from the American Red Cross came to administer the procedure . It affects about one in every 10,000 people, and it kills more than 100 children each year. Each exchange transfusion requires 10 units of red blood cells .
Marquita Gaines is a 20-year-old college student with sickle cell disease . Sickle cell disease is a genetic blood disorder that can cause severe pain . It affects about one in every 10,000 people, and it kills more than 100 children each year. Each exchange transfusion requires 10 units of red blood cells .