One March day in 1907, a man appeared at the Park Avenue brownstone where 37-year-old Mary Mallon worked as ... uncooperative and without a family. Today Mallon’s case is archetypal in bioethics ...

Born in Cookstown, Co. Tyrone, Mary Mallon emigrated to New York where ... Anywhere that Mary worked, family members in the household started to develop typhoid fever. In 1906, Mary worked for ...