Typhoid - Typhoid

Baker tracked her down five years later, working under an alias in the kitchen of Sloane Maternity Hospital, which was in the midst of a typhoid outbreak.

The bacteria are passed on by eating food or drinking water that has been contaminated by someone with the disease.

Other sources attribute at least three deaths to contact with Mallon, but because of health officials' inability to persuade her to cooperate, the exact number is not known.

Some sources claim that a post-mortem found evidence of live typhoid bacteria in Mallon's gallbladder.