Frasier: (Speaking of Dr. Nora to Kenny) Putting that woman behind a microphone full time is like putting Typhoid Mary in a kissing booth!
Typhoid Mary's real name was Mary Mallon. She worked as a cook in New York in the early 1900's. She was given the name "Typhoid Mary" because she was said to have infected everyone she came near, recklessly spreading the desease all over New York. In truth only 50 cases of typhoid can be attributed to her and only three deaths. She, herself, although a carrier of the disease, was never symptomatic.