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?
Sara Josephine Baker Sara Josephine Baker (November 15, 1873 – February 22, 1945) was an American physician notable for making contributions to public health, especially in the immigrant communities of New York City. Her fight against the damage that widespread urban poverty and ignorance caused to children, especially newborns, is perhaps her most lasting legacy. In 1917, she noted that babies born in the United States faced a higher mortality rate than soldiers fighting in World War I, drawing a great deal of attention to her cause. She also is known for (twice) tracking down Mary Mallon, the infamous index case known as Typhoid Mary.
Emmanuel Steinschneider Emmanuel Efimovich Steinschneider (Russian: Эммануил Ефимович Штайншнайдер ; 21 December 1886 – 2 December 1970), was a Russian Empire and USSR physician and medical researcher, best known for his studies on influenza, malaria, typhoid, typhus, dysentery and other infections that were rampant during the first half of the 20th century.