He was an Austrian physician who received the Nobel Prize in Medicine in 1930 for his work on blood groups.
World Blood Donor Day is celebrated in his honor on June 14 of each year, which is his birthday.
He was born in 1868 in Vienna.
His father was a newspaper publisher. He died when Karl was 6 years old.
He studied in his hometown and was involved in biochemical research.
He worked on the effect of diets on blood.
In 1916 he married and had a son.
In 1922 he moved to New York City where he lived the rest of his life.
He died in 1943 of a heart attack.
[Source: el.wikipedia.org]
