Who is James Harrison and how did he save more than 2 million lives of newborn babies?

A 75 year old Australian, James Harrison, during his life time donated blood more than 1000 times. The antibodies that he has in his rare blood group help to save lives of newborn babies with extreme forms of anemia. Because of his blood donations medics could save more than 2 million lives.

SOUCE: http://www.dailymail.co.uk/news/article-1259627/Man-golden-arm-James-Harrison-saves-2million-babies-half-century-donating-rare-blood.html
IMAGE: www.dailymail.co.uk