Paul Ehrlich 保罗·埃尔利希
Paul Ehrlich (14 March 1854 – 20 August 1915) was a German physician and scientist who worked in the fields of hematology, immunology, and antimicrobial chemotherapy. He invented the precursor technique to Gram staining bacteria. The methods he developed for staining tissue made it possible to distinguish between different types of blood cells, which led to the capability to diagnose numerous blood diseases.