Passage: James Christopher Harrison (born 27 December 1936), OAM, also known as the Man with the Golden Arm, is a blood plasma donor from Australia whose unusual plasma composition has been used to make a treatment for Rhesus disease.  He has made over 1000 donations throughout his lifetime, and these donations are estimated to have saved over 2.4 million unborn babies from the condition. On 11 May 2018 he made his 1173rd donation – his last, as Australian policy prohibits blood donations from those past age 81.

Question: What did  James Christopher Harrison donate which made him famous?
blood plasma