Every day, people like you need platelet transfusions to support them through treatments for cancer, leukemia, aplastic anemia, traumatic injuries and other life-threatening conditions. With one apheresis donation, you can safely give up to 12 times the number of platelets typically contained in a whole blood donation. Because we can only store platelets for five days, we need many platelet donations every day to ensure a full supply of this life-saving resource.