Kigali - Every year, World Blood Donor Day is celebrated on June 14. This is an opportunity to raise public awareness on the essential contribution of voluntary blood donors to boost national blood transfusion services and save lives. This year's theme, “Giving Blood: An Act of Solidarity. Join the movement and save lives! was heard by Alphonse, a regular blood donor at the National Blood Transfusion Center in Kigali, the capital of Rwanda.