Red blood cells travel through your body delivering oxygen. Units of red blood cells are often used in Emergency & Operating Rooms when treating accident victims and during surgeries. Red blood cells are also necessary when treating patients with anemia.
People with Type O blood are especially in demand with O+ being able to donate red blood cells to anyone who has an RH factor + while O- can donate to anyone with either RH + or –. These donors are referred to as universal donors.
If you are Type O, you can make the most of your donation by donating whole blood or double red cells. A double red cell donation is made through apheresis where red blood cells are removed and fluids are returned to the donor. It takes only a few minutes more that whole blood donations.
Whole blood donors are eligible to give blood every eight weeks. Double red cell donors are eligible every 16 weeks.