Typhoid Mary tried this and ended up locked up for 23+ years.
http://en.wikipedia.org/wiki/Typhoid_Mary
Wiki excerpt:
Release, name-change and second quarantine (1915–1938)
Upon her release, Mallon was given a job as a laundress, which paid less than cooking. She soon changed her name to “Mary Brown”, and returned to her old occupation. For the next five years, she worked in a number of kitchens; wherever she worked, there were outbreaks of typhoid. However, she changed jobs frequently, and Soper was unable to find her.
In 1915, Mallon started another major outbreak, this time at Sloane Hospital for Women in New York City. Twenty-five people were infected and two died. She again left, but the police were able to find and arrest her when she brought food to a friend on Long Island.
What is interesting that people were getting Typhoid from Mary through the food she cooked and eating it and not getting it even if your close to her. Weird disease.