Paul Ehrlich was a German #scientist who worked in the fields of#hematology#immunology, and #chemotherapy. He discovered#arsphenamine (Salvarsan), the first effective medicinal treatment for syphilis. It became the concept of chemotherapy. Also, Ehrlich develop his famous side-chain theory which is a theoretical basis for immunology. In 1908, he received the #Nobel Prize in #Physiology or Medicine together with Élie Metchnikoff.

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