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 McLeod Bethune Mary Jane McLeod Bethune (born Mary Jane McLeod; July 10, 1875 – May 18, 1955) was an American educator, stateswoman, philanthropist, humanitarian and civil rights activist best known for starting a private school for African-American students in Daytona Beach, Florida. She attracted donations of time and money, and developed the academic school as a college. It later continued to develop as Bethune-Cookman University. She also was appointed as a national adviser to President Franklin D. Roosevelt as part of what was known as his Black Cabinet. She was known as "The First Lady of The Struggle" because of her commitment to gain better lives for African Americans.