HUNTSVILLE, Ala. – The American Red Cross is calling on donors to give blood or platelets now to help boost the national blood supply this month. People can easily schedule a donation appointment by visiting RedCrossBlood.org, downloading the Red Cross Blood Donor App, or simply calling 1-800-RED CROSS. All blood types are needed, especially type O, which is in high demand by hospitals, along with platelet donors, to ensure a steady supply of blood products for emergencies.