How do you say thank you to the man who has saved the lives of more than 2.4 million babies?
You get together a special choir and sing to him, of course.
Former Junee man James Harrison made a whopping 1172 donations of blood plasma over a period of 62 years.
He began making donations himself when he turned 18, and after about 12 years of donating, his blood was found to have consistently high levels of antibodies which make it particularly valuable in making anti-D immunoglobulin injections.
These injections are vital for saving the lives of unborn babies at risk of Rhesus disease, including one of James's own grandsons.
About 17 per cent of all pregnant women now need an anti-D booster shot to protect their babies against Rhesus disease, and until very recently, every batch made in Australia contained Mr Harrison's antibodies.
To pay tribute to Mr Harrison, who retired from donating last year at the age of 81, producer Mark Opitz from the ABC's The Recording Studio put together a special choir - including Red Cross staff and grateful parents - to say a special thank you with a performance of Happy.