James Harrison's rare blood, which he donated over a thousand times, is estimated to have saved the lives of over 2 million ...

Mike thinks that Alf is scared to give blood and so places a bet with him that, even if he did give blood, it would be rejected. Alf rises to the challenge but is worried that his blood will be given ...

Harrison, whose plasma contained a rare antibody, rolled up his sleeve 1,173 times from 1954 to 2018. The Australian is credited with helping 2.4 million babies and advancing scientific research.