James Harrison, an Australian man, became one of the most extraordinary donors in medical history. His blood contained a rare antibody used to create a life-saving treatment for Rh disease in newborns.

From the age of 18 until he was 81, he donated blood plasma every two weeks without missing appointments for decades. In total, his donations helped save an estimated 2.4 million babies from a potentially deadly condition.

Doctors say his commitment was not only rare but life-changing for generations of families. Even though he lived a quiet life, his impact reached hospitals across Australia and beyond.

His story is often cited as one of the most powerful examples of how one ordinary person can create an extraordinary global impact.