Sara Josephine Baker was an American physician notable for making contributions to public health, known for twice tracking down which infamous index case better known as Typhoid Mary,  the first person in the United States identified as an asymptomatic carrier of the pathogen associated with typhoid fever, her name?
Mary Mallon Mary Mallon (September 23, 1869 – November 11, 1938), better known as Typhoid Mary, was the first person in the United States identified as an asymptomatic carrier of the pathogen associated with typhoid fever. She was presumed to have infected 51 people, three of whom died, over the course of her career as a cook. She was twice forcibly isolated by public health authorities and died after a total of nearly three decades in isolation.
Sophie Spitz Sophie Spitz, M.D. (4 Feb 1910–11 August 1956) was an American pathologist who published the first case series of "juvenile melanoma," (a special form of benign melanocytic nevi), skin lesions that have come to be known as Spitz nevi. For her contributions to pathology, and especially for her foresight in advocating the use of the pap smear when it was newly devised, she is recognized as a prominent pathologist of her time.