Aussies are being urged to roll up their sleeves and give blood as flu season creates shortages. (Dan Himbrechts/AAP PHOTOS)Aussies are being urged to roll up their sleeves and give blood as flu season creates shortages. Donated blood is needed for a range of patients including cancer sufferers, new mothers, people undergoing surgery and children. Australian Red Cross Lifeblood says 12,000 donations are immediately needed to support patients in life-threatening situations. Camera Icon Australian Red Cross Lifeblood says 12,000 donations are immediately needed to support patients in life-threatening situations.