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| Mary Mallon |
Mary Mallon, better known as Typhoid Mary, was the first person in the United States identified as carrier without obvious clinical signs of disease the symptoms of microorganisms that can cause typhoid fever.
Mary Mallon was born in Cookstown, County Tyrone, in what is now Northern Ireland in 1869.
She left Ireland and headed for the United States in 1883 at the age of 15, heading for New York City, where she lived with her aunt and uncle until their deaths.
