In the late 1800s, Mary Mallon was a cook for wealthy families in New York City. She thought her job was going well; her clients seemed pleased and she had a reputation as an exceptional chef. But then, the family members started getting sick, and Mary had no idea that she was the cause.Keep up with us on Instagram @serialkillerspodcast! Have a story to share? Email us at serialkillerstories@spotify.com Learn more about your ad choices. Visit podcastchoices.com/adchoices