Mary Mallon looked healthy. She felt healthy. But everywhere the cook worked, typhoid fever seemed to follow.
The Mystery Cook
Mary Mallon was an Irish immigrant who worked as a cook for wealthy families in the New York area.
There was just one enormous problem.
Mallon was an asymptomatic carrier of the bacteria that causes typhoid fever.
She could carry and spread the disease without appearing sick herself.
At the beginning of the 20th century, that concept was difficult for many people to understand—including Mary.
Following the Outbreaks
Sanitary engineer George Soper investigated a series of typhoid cases and eventually connected outbreaks to households where Mallon had worked.
Health authorities detained her in 1907, and she was quarantined on North Brother Island.
After approximately three years, she was released under the condition that she stop working as a cook.
Eventually, however, authorities traced additional typhoid outbreaks to kitchens where she was working.
She was returned to North Brother Island.
This time, she remained there for the rest of her life.
The Woman Behind the Nickname
“Typhoid Mary” became one of history’s most famous public-health nicknames.
But Mallon’s story is more complicated than the nickname.
It raised difficult questions about public health, individual freedom, scientific understanding and how authorities should deal with a person who appears perfectly healthy but can transmit a dangerous disease.
Mary Mallon spent roughly 26 years of her life in quarantine before dying in 1938.
History can be ugly.
And sometimes you can’t even see what’s causing it.
Key Facts
- Person: Mary Mallon
- Born: 1869
- Died: 1938
- Location: New York
- Occupation: Cook
- Disease: Typhoid fever
- First quarantine: 1907
- Known as: “Typhoid Mary”