Mrs.Rebecca Akufo-Addo, the First Lady, Sunday called on all healthy Ghanaians to donate blood and save lives, as the world marks Blood Donor Day today. "Today I am supporting the call for all healthy Ghanaian citizens, to be Champions of Change, please give blood and save lives", Mrs Akufo-Addo who doubles as the Executive Director of the Rebecca Foundation said in a message to mark the day.