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.
Rose Frisch Rose Epstein Frisch (7 July 1918 – 30 January 2015) was an American biologist whose work was instrumental in the discovery of leptin. She is mainly known for her work in infertility; specifically the discovery that low body fat was a contributing factor to infertility.