
author
1854–1915
A Nobel Prize-winning scientist helped change medicine by showing how the body fights disease and by pursuing the dream of drugs that could target illness precisely. His work on immunity, blood cells, and the first effective treatment for syphilis made him one of the great pioneers of modern medical science.

by Paul Ehrlich, Adolf Lazarus
Born in 1854 in Strehlen, then in Prussia, Paul Ehrlich became a German physician and researcher whose ideas helped shape hematology, immunology, and chemotherapy. Early in his career he became known for innovative staining techniques that made different types of blood cells easier to distinguish under the microscope, opening new paths for laboratory medicine.
Ehrlich spent much of his career studying how the body responds to infection. His research on immunity earned him the 1908 Nobel Prize in Physiology or Medicine, shared with Élie Metchnikoff. He also developed influential theories about how antibodies and cells interact, helping lay the groundwork for modern immunology.
He is especially remembered for his search for a so-called "magic bullet": a compound that could attack disease without harming the patient. That vision led to Salvarsan, introduced in 1910 as the first effective drug treatment for syphilis. Ehrlich died in 1915, but his combination of laboratory science, medicine, and bold practical ambition continues to echo through modern drug discovery.