Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-American cook. She 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.[1] She was twice forcibly isolated by public health authorities and died after a total of nearly three decades in isolation.[2][3]

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