National Blood Donor Week: 18 - 24 July 2010 Dear Prajwal, By donating blood you have saved lives. On behalf of these people and their  families, the Red Cross Blood Service would like to say thank you. This National Blood Donor Week, 18 to 24 July 2010, the Blood Service  recognises and celebrates your valuable contribution and commitment to saving  lives. In the past year, Australians have given over one million blood donations to  help patients in need. Thank you for your continued support.