Typhoid Mary

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Bring to mind forgotten word acquaintances with
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The Word of the Day for January 14 is: 

Typhoid Mary   \TYE-foid-MAIR-ee\   noun
     : one that is by force of circumstances a center from 
which something undesirable spreads

Example sentence: 
     "We don't want any Typhoid Marys here," the supervisor 
told employees, "so if you have a bad cold, do your coworkers a 
favor and stay home."

Did you know?
     The original Typhoid Mary was a New York City cook in the 
early 1900s who loved her job. Unfortunately, she had been 
exposed to typhoid, and although she was immune to the disease 
herself, she was able to pass the disease to others by way of 
the food she prepared. Health officials identified her as Mary 
Mallon, an Irish-born immigrant, and they quarantined her to 
stop the spread of the disease. Three years later, Mary was 
released with a warning not to cook professionally again. But 
in 1915, she was discovered working as a cook at a maternity 
hospital identified as the source of a new typhoid outbreak, 
and she was forcibly returned to quarantine, where she remained 
until her death in 1938.