- Person
- Karl Landsteiner
- Lived
- 1868–1943
- Field
- Pathology
- From
- Austrian-American
The story
Karl Landsteiner was born on 14 June 1868 in Baden bei Wien, near Vienna, into a Jewish family. His father, Leopold, was a well-known journalist and editor of the newspaper Die Presse, and died when Karl was six. The boy was raised by his mother, Fanny, to whom he remained deeply devoted.
Landsteiner studied medicine at the University of Vienna, finishing his doctorate in 1891, and then spent time in the chemistry laboratories of Emil Fischer and others before returning to Vienna. In 1901 he explained why so many early transfusions had ended in disaster: human red blood cells come in different groups, and mixing incompatible blood makes the cells clump. That insight, recognised with the Nobel Prize in 1930, is why he is widely described as the father of transfusion medicine. He later moved to New York in 1923 to work at the Rockefeller Institute.
More than a century after his birth, the date became a global occasion. World Blood Donor Day was first organised in 2004 by four international bodies: the World Health Organization, the International Federation of Red Cross and Red Crescent Societies, the International Federation of Blood Donor Organizations and the International Society of Blood Transfusion. Since 2005 it has been held every 14 June, the anniversary of Landsteiner's birth.
The day has two aims: to raise awareness of the need for safe blood and blood products, and to thank the voluntary, unpaid donors who give blood for people they will never meet. It is one of a small number of official global public health campaigns marked by WHO. Each year brings a new theme and often a host country. Recent campaigns have included Give blood, give hope: together we save lives in 2025, and a 2024 message thanking donors for 20 years of giving.
Blood transfusion supports complex surgery, cancer treatment and care for accident victims, and it plays a vital role in childbirth, where severe bleeding can be fatal. WHO stresses that a steady supply depends on regular voluntary donors, and many countries still struggle to collect enough. Each June, blood services around the world use Landsteiner's birthday to recruit new donors, linking a laboratory discovery made in Vienna in 1901 to an act of generosity that anyone can repeat.
Why it matters
World Blood Donor Day encourages people worldwide to give blood voluntarily, helping blood services keep enough safe supplies for surgery, childbirth and emergencies.
About Karl Landsteiner
Discovered the human ABO blood groups, making safe blood transfusions possible. Nobel laureate, 1930.
More about Karl Landsteiner
- Karl Landsteiner made blood transfusion safeIn 1901 Karl Landsteiner showed that human blood falls into distinct groups, explaining why transfusions so often failed and making safe transfusion possible.
- Karl Landsteiner brought chemistry into immunologyKarl Landsteiner discovered small molecules he named haptens and showed how chemistry shapes immune reactions, helping found the field of immunochemistry.
- Landsteiner found new blood groups used in paternity casesIn 1927 Karl Landsteiner and Philip Levine discovered the M, N and P blood groups. The same year the types began to be used to help settle paternity cases.
- Karl Landsteiner showed that polio is caused by a virusIn 1909 Karl Landsteiner and Erwin Popper showed that polio could be transmitted to monkeys, proving it was infectious and isolating the poliovirus.
- Landsteiner and Wiener discovered the Rh blood factorWorking from 1937, Karl Landsteiner and Alexander Wiener identified the Rhesus factor in blood, reported in 1940, enabling physicians to transfuse blood far more safely.
Sources
- World Blood Donor Day World Health Organization
- Karl Landsteiner Wikipedia
- World Blood Donor Day Wikipedia
Another act of tikkun olam. This is part of tikkun olam, the Jewish idea of repairing the world, and every one of us can add to it.