Landsteiner identified the agents responsible for immune reactions, examined the interaction of antigens and antibodies, and studied allergic reactions in experimental animals.
Landsteiner graduated from medical school at the age of 23 and immediately began advanced studies in the field of organic chemistry, working in the research laboratory of his mentor, Ernst Ludwig.
Landsteiner took a portion of the boy's spinal column and injected it into the spinal canal of several species of experimental animals, including rabbits, guinea-pigs, mice and monkeys.
Karl Landsteiner (June 14, 1868 – June 26, 1943), was an Austrian biologist and physician.
He is noted for his development in 1901 of the modern system of classification of blood groups from his identification of the presence of agglutinins in the blood, and in 1930 he received the Nobel Prize in Physiology or Medicine.
He was born in Vienna, Austria to Leopold Landsteiner, a journalist and newspaper editor who was also a doctor of law.