'Man with the golden arm' saves 2million babies in half a century of donating rare type of blood. Harrison, 74, has an antibody in his plasma that stops babies dying from Rhesus disease, a form of severe anaemia. He has enabled countless mothers to give birth to healthy babies, including his own daughter, Tracey, who had a healthy son thanks to her father's blood.

'Man with the golden arm' saves 2million babies in half a century of donating rare type of blood. Harrison, 74, has an antibody in his plasma that stops babies dying from Rhesus disease, a form of severe anaemia. He has enabled countless mothers to give birth to healthy babies, including his own daughter, Tracey, who had a healthy son thanks to her father's blood.