Welkom Call to Action: SANBS would like to call upon all businesses and organisations to pledge to save lives in order to achieve the target of 100 units. Red Saturday — One unit. One continent. One purpose. On this day Africa unites for Red Saturday — a continent-wide blood donation drive to save lives. Join SANBS and partners across Africa to help collect 10,000 units in one day. Every drop counts, especially group O, the universal blood type. Help to collect 100 units of life-saving blood.