Paul Ehrlich

Born in 1854 in what was then Strehlen, Prussia, Paul Ehrlich became one of the most influential medical researchers of his era. He trained as a physician and built his reputation through careful work on staining techniques, blood cells, and the body’s defenses against infection.

Ehrlich’s research helped shape the early science of immunology, and in 1908 he shared the Nobel Prize in Physiology or Medicine for work on immunity. He is also widely remembered for his idea that drugs could be designed to target disease-causing organisms precisely—a concept he described with the memorable image of a “magic bullet.”

That idea led to his best-known medical breakthrough: the development of Salvarsan, introduced in 1910 as an important early treatment for syphilis. He died in 1915, but his influence can still be felt in laboratory medicine, immunology, and the long search for targeted therapies.