"Typhoid Mary" is a term used to describe someone who spreads disease without realizing it. While the origins of the term come from Mary Mallon, a cook in the early 20th century who unknowingly spread typhoid fever to dozens of people, there are a variety of synonyms that can be used to describe this type of person. Some popular options include "carrier," "inducer," "infector," "spreader," and "contaminator." Each of these words highlights the contagious nature of the person's actions, and shows that they are unwittingly harming those around them. Whether you call someone "Typhoid Mary" or use another term, it's important to recognize the impact that contagious illnesses can have on individuals and communities.