(Science: person) this native of Vienna in 1900 discovered iso-agglutinins in human blood and then showed that blood had specific groups, which was responsible for the safety of giving blood transfusions.
With Alexander Weiner, he discovered the rh factor in human blood. Along with Poppen he proved that poliomyelitis could be transmitted to subhuman primates by intraspinal injection.
From 1892 to 1943 landsteiner published 346 scientific articles. In 1930, he became a winner of the Nobel Prize.