Prompt
Create a realistic portrait of Simon Flexner, a middle-aged man with a gentle face and a hint of introspection, dressed in formal attire typical of the early 20th century, set against a backdrop that subtly suggests his association with medicine and research, such as a faint image of a laboratory or medical texts. Capture the essence of a pathologist, biologist, and researcher who made significant contributions to medicine, particularly in the areas of poliomyelitis, meningitis, and through the development of the Flexner serum and identification of Flexner's bacillus. Incorporate elements that reflect his American heritage and his long-standing connection with prestigious institutions like the Rockefeller Institute for Medical Research.
