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.
Mary Jefferson Eppes Mary Jefferson Eppes (née Jefferson; August 1, 1778 – April 17, 1804), known as Polly in her childhood and Maria as an adult, was the younger of Thomas Jefferson's two daughters who survived infancy. She married a first cousin, John Wayles Eppes, and had three children with him. Only their son Francis W. Eppes survived childhood. Maria died months after the birth of her third child.