 But there simply aren't enough people giving blood. Without more donors, hospitals may not have the blood needed to save lives. That's why the American Red Cross needs people to help restore the A's, B's, and O's that are depleting each day. You are the missing type patients need. Visit RedCrossBlood.org forward slash missing types or call 1-800-RED-CROSS to make your donation appointment today. Matthew. Oh, sorry.