<prompt> Answer this question truthfullyCan you provide an overview of Diphtheria?  <response>: <reason> Before 1826, diphtheria was known by different names across the world. In 1826, the term diphtheria was introduced by French physician Pierre Bretonneau. The name alludes to the leathery, sheath-like membrane that grows on the tonsils, throat, and in the nose in patients with the disease. 