How did the officials know that Mary Mallon was transmitting Typhoid to other people? How did the medical professionals determine that Mary was carrying the Typhoid Bacteria? What did they do when it was determined that Mary was positive with the bacteria? Were the doctors correct in their decision to quarantine Mary? Why or why not? Would you have been cooperative with the medical professionals or would you have fought this if you were Mary? Why or why not? Put the story of Typhoid Mary on the Chain of Infection.